Kev lag luam 2024, Lub Xya hli ntuj
Toggle hloov - tsim nta, ntau yam
Lub riam hloov yog lub cuab yeej hloov tshwj xeeb. Nws yog siv los hloov cov hluav taws xob hluav taws xob, xa hluav taws xob. Xws li cov tshuab ua haujlwm nrog phau ntawv tsav tsheb
Lub tshuab ntse ntse: qhov zoo, ntau yam thiab cov yam ntxwv ntawm kev xaiv
Nws yuav tsum tau muab sau tseg tias cov tshuab sib tsoo tau ruaj khov rau hauv peb lub neej. Ua tsaug rau cov cuab yeej no, koj tsis tas yuav ua txhua yam kev ua kom rov ua kom muaj zog ntawm riam, saws, txiab thiab lwm yam cuab yeej manually
Tyre changer for trucks: overview, specifications, types and reviews
Cov kab lus no tau mob siab rau cov log tsheb hloov tsheb rau cov tsheb thauj khoom. Cov yam ntxwv, ntau yam, kev tshuaj xyuas thiab nuances ntawm kev xaiv cov cuab yeej no suav nrog
Chrysotile cement yeeb nkab: specifications thiab daim ntawv thov
Kev sib txuas lus muaj xws li cov channel ntawm ib qho loj me. Raws li cov khoom siv hauv ntau ntawm lawv, cov yeeb nkab chrysotile cement tuaj yeem siv tau, cov khoom tseem ceeb ntawm cov khoom yog hom asbestos
Txias ua-nws-koj tus kheej galvanizing
Corrosion ntawm hlau tshwm sim thaum nws cuam tshuam nrog atmospheric oxygen. Txhawm rau zam qhov no thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv ob peb zaug, nws yog ib qho tsim nyog yuav tsum tau ua cov txheej txheem tiv thaiv
Gypsum mixs: muaj pes tsawg leeg, zoo tshaj plaws, cov lus qhia rau kev siv thiab tshuaj xyuas
Plaster sib tov hauv kev tsim kho yog siv dav heev. Xws li cov khoom siv tuaj yeem siv rau sab hauv phab ntsa, qab nthab, facades, kab, thiab lwm yam. Muaj ntau ntau hom kev sib xyaw ua ke ntawm cov khw niaj hnub no. Thiab ib qho ntawm ntau yam nrov tshaj plaws yog plaster raws li gypsum. Ntau lub tuam txhab tsim cov ntawv sau zoo li no. Txawm li cas los xij, qee hom gypsum sib tov yog, ntawm chav kawm, nrov tshaj plaws ntawm cov neeg siv khoom
Cua sov cable: yam ntxwv, kev teeb tsa nta, qhov dav
Kev piav qhia dav dav ntawm cov cua sov cables thiab lawv cov kev teeb tsa. Kev txiav txim siab ntawm qhov hloov pauv tseem ceeb hauv kev siv cov khoom zoo li no. Ib tug xov tooj ntawm cov yam ntxwv tseem ceeb thaum xaiv. Self-regulating thiab resistive cua sov cables. Nta thiab cov lus qhia installation. Sab hauv thiab sab nraud tso cua sov cable rau cov kav dej thiab cov kav dej. Installation nta rau underfloor cua sov thiab ntws
Cov khoom tseem ceeb thiab cov feem ntawm cov av nplaum nthuav dav
Nthuav av nplaum feem ntau - qhov no tsis yog tib qho kev ntsuas uas koj yuav tsum paub txog koj tus kheej. Nws tseem yog ib qho tseem ceeb kom paub txog qhov tshwj xeeb lub ntiajteb txawj nqus, qhov zoo tagnrho tus nqi yog nyob rau hauv 0.95 g / cm3
Irkutsk HPP: kev tsim kho, keeb kwm, duab
Irkutsk HPP yog thawj zaug thiab loj tshaj plaws hydroelectric fais fab nroj tsuag tsim nyob rau hauv Angara. Nws nteg lub hauv paus rau tsim ib tug tag nrho lub zog complex. Kev nyuaj hauv nws txoj kev tsim kho tau pab kom tau txais kev paub tsis muaj nuj nqis tiag tiag
Kirovsky cog, St. Petersburg. Cov khoom ntawm Kirov cog
Rau ntau tshaj 200 xyoo, Kirov cog (St. Petersburg) tau ua haujlwm rau cov txiaj ntsig ntawm Russia. Founded hauv lub Plaub Hlis 1801 raws li ib tug me me hlau foundry, hnub no nws tau los ua ib tug ntau haiv neeg muaj complex. Cov neeg ua haujlwm hauv lub Hoobkas tau sawv ntawm lub hauv paus pib ntawm kev lag luam tsheb laij teb hauv tsev, pib xyoo 1924 kev tsim khoom loj ntawm Fordson-Putilovets tsheb laij teb
Vuam chav tsev: txheej txheem cej luam, hom, yam ntxwv, piav qhia thiab tshuaj xyuas
Tsis yog nyob rau txhua qhov xwm txheej, koj tuaj yeem siv lub tshuab vuam uas txuas rau qhov hluav taws xob. Tshwj xeeb tshaj yog tias nws yog ib lub tsev los ntawm kos. Rau cov xwm txheej zoo li no, lub tshuab vuam yog tsim
TVEL yog Cov lus qhia ntxaws
Cov lus hais txog dab tsi TVEL yog vim li cas nws thiaj li xav tau, siv qhov twg, nws tsim li cas thiab seb puas muaj cov reactors uas tsis siv TVEL
Zirconium: alloys raws li nws. Properties, kev siv
Tsis tshua muaj, tab sis tib lub sijhawm tseem ceeb heev hauv ntau qhov kev lag luam, cov hlau - zirconium - tau raug cais tawm thawj zaug hauv xyoo 1824. Txawm li cas los xij, nws tseem muaj qee feem pua ntawm lwm cov ntsiab lus. Tsuas yog nyob rau hauv lub xyoo pua 20th nws muaj peev xwm tau txais cov zirconium ntshiab, dawb los ntawm ntau yam impurities. Kawm paub ntxiv txog nws
Gas ziab: txhais, yam ntxwv, txoj kev thiab hom kev ua haujlwm, daim ntawv thov kev teeb tsa thiab cov cuab yeej tshwj xeeb
Gas kom qhuav yog ib txoj hauv kev tu kom tshem tawm cov dej noo hauv cov kav dej. Nws cov tsos yog qhov txaus ntshai heev, vim nws ua rau corrosion ntawm cov hlau. Tsis tas li ntawd, txij li cov mining yog nqa tawm nyob rau hauv tej yam kev mob ntawm tsawg kub, dej khov yog ua tau
Coal: kev faib tawm, hom, qib, yam ntxwv, combustion nta, qhov chaw rho tawm, daim ntawv thov thiab qhov tseem ceeb rau kev lag luam
Coal yog ib qho chaw sib txawv thiab ntau yam. Vim nws peculiarity ntawm tsim nyob rau hauv lub plab hnyuv ntawm lub ntiaj teb, nws muaj peev xwm muaj ntau yam txawv. Yog li ntawd, nws yog txoj cai los faib cov thee. Yuav ua li cas qhov no tshwm sim yog piav nyob rau hauv tsab xov xwm no
Pervouralsky Novotrubny cog: nag hmo thiab tag kis
Tsis yog hauv peb lub tebchaws xwb, tabsis tseem nyob deb dhau ntawm nws ciam teb, Pervouralsk Novotrubny cog nyiam lub koob npe nrov tsim nyog raws li tus khub txhim khu kev qha thiab ruaj khov. Yuav ua li cas cov nroj tsuag tswj kom ncav cuag ib theem siab?
Metallurgy yog Metallurgy industries, qhauj thiab lawv qhov chaw
Metallurgy yog kev lag luam uas tso cai rau tib neeg tsis yog nyob, tab sis kuj tsim. Tsis tas li ntawd, thaj chaw ntawm kev ua ub no yog qhov tseem ceeb ntawm cov nyiaj tau los txawv teb chaws rau txhua lub tebchaws hauv ntiaj teb. Thiab yog li ntawd, hauv tsab xov xwm no, cia saib txhua yam ntsig txog metallurgy
Nizhnekamsk HPP: keeb kwm kev tsim kho, xwm txheej, cov ntaub ntawv dav dav
Nizhnekamskaya HPP hauv Tatarstan yog qhov tshwj xeeb thiab tsuas yog lub zog lag luam hauv tebchaws txuas nrog UES ntawm Russia. Ua tsaug rau qhov kev lag luam no, uas yog ib feem ntawm Tatenergo tuav, cov neeg nyob hauv cheeb tsam tau txais hluav taws xob tsis cuam tshuam
Pob zeb ntsev halite: cov khoom, piav qhia thiab qhov dav
S alt halite yog cov ntxhia ntuj uas tau txais cov lus paub zoo. Cov ntxhia ua haujlwm muaj ntau yam khoom, daim ntawv thov uas tau pom nyob rau hauv 14,000 thaj chaw. Feem ntau ntawm lawv yog kev kho mob ntawm txoj kev nto hauv kev sib ntaus sib tua tiv thaiv dej khov
Zener diode - nws yog dab tsi thiab nws yog dab tsi?
Zener diode yog ib qho semiconductor diode nrog cov khoom tshwj xeeb. Yog hais tias ib tug zoo tib yam semiconductor yog ib tug insulator thaum switched rov qab, ces nws ua hauj lwm no kom txog rau thaum ib tug tej yam nce nyob rau hauv cov ntaub ntawv voltage, tom qab uas ib tug avalanche-zoo li reversible breakdown tshwm sim. Nrog rau kev nce ntxiv hauv qhov rov qab tam sim no ntws los ntawm zener diode, qhov hluav taws xob txuas ntxiv mus tas li vim muaj qhov sib npaug ntawm qhov tsis kam. Nyob rau hauv no txoj kev, nws yog ua tau kom ua tiav ib tug stabilization regime
Tais rau cua sov lub ntsiab: qhov ntev, GOST. Reinforced pob zeb tais rau cua sov mains
Txhim kho pob zeb ua kom sov lub tais yog cov duab plaub thiab muaj kev teeb tsa gutter. Cov kev txwv rau hom dav, qhov ntev thiab qhov siab ntawm cov qauv sib txawv txawv ntawm ib leeg. Cov txheej txheem yog ua los ntawm cov pob zeb hnyav, uas, tom qab hardening, tsis tshua muaj resistant rau ntau hom loads. Tsis tas li ntawd, cov tais no yog Frost-resistant
Insulated yeeb nkab: piav qhia thiab daim ntawv thov
Rwb thaiv tsev thermal ntawm lub raj xa dej yog tsim nyog los txo cov nqi hluav taws xob xav tau rau qhov chaw cua sov. Txoj kev yooj yim tshaj plaws los siv cov khoom siv insulating yog qhia hauv kev siv cov khoom xws li cov kav dej kub-insulated rau cua sov. Lawv siv tau tso cai los txo cov nqi hluav taws xob, nrog rau kev yooj yim installation
PPU rwb thaiv tsev. Kev tsim cov kav dej hauv polyurethane ua npuas ncauj rwb thaiv tsev
PPU rwb thaiv tsev yog suav tias yog qhov ua tau zoo tshaj plaws niaj hnub no, vim tias cov khoom siv no muaj cov thermal conductivity qis tshaj plaws, thiab tseem muaj cov khoom siv dej tsis zoo. Cov yam ntxwv tom kawg yog vim muaj 99 feem pua ntawm cov pores kaw hauv cov khoom siv
Yuav ua li cas cov hlau alloyed muaj?
Alloy steels txawv ntawm cov khoom zoo tib yam los ntawm kev muaj cov khoom siv ua tswv cuab ntxiv uas tau txiav txim siab qee yam khoom ntawm yav tom ntej alloy. Yog li, cov pa roj carbon zoo tib yam muaj nyob rau hauv ntau qhov sib npaug "cov nplej" ntawm ferrite, cementite thiab perlite. Nrog kev qhia txog cov ntsiab lus alloying, cov pa roj carbon ntau hauv pearlite feem ntau txo qis (lub zog ntawm cov hlau nce)
Khoom thiab kua foob pob ua ntxaij cav
Missiles raws li hom riam phom muaj nyob rau lub sijhawm ntev heev. Cov tho kev hauv qhov teeb meem no yog Suav, raws li tau hais hauv zaj nkauj ntawm Celestial Empire thaum pib ntawm lub xyoo pua 19th. "Liab glare ntawm rockets" - qhov no yog li cas nws yog hu ua nyob rau hauv nws
Cov cua kub siab qis: txhais, lub hauv paus ntawm kev ua haujlwm, cov yam ntxwv ntawm kev ua haujlwm, kev faib tawm, tsim, kev ua haujlwm nta, daim ntawv thov hauv kev lag luam
Cov cua kub siab qis (LPH) tam sim no siv heev. Muaj ob hom tseem ceeb uas yog tsim los ntawm cov nroj tsuag sib txawv. Lawm, lawv kuj txawv ntawm lawv cov kev ua tau zoo
Ua-nws-koj tus kheej yeeb nkab dabtsi yog khoov tshuab
Yog tias koj txiav txim siab los ua ib phau ntawv yeeb nkab bender, koj yuav tsum tau tsim ib qho kev txhim khu kev qha. Nws cov ntsiab lus txuas nrog bolts lossis vuam. Tom ntej no, ib qho axis ntawm kev sib hloov thiab shafts yog ntsia, ob ntawm cov uas yuav nyob rau saum toj thib peb. Qhov kev ncua deb ntawm cov axes ntawm cov ncej yuav txiav txim siab lub vojvoog ntawm qhov khoov
Turbine roj: yam ntxwv, kev faib tawm thiab daim ntawv thov
Turbine roj yog cov khoom siv zoo tshaj plaws uas tau siv dav los lubricate ntau yam txheej txheem thiab cov khoom ntawm kev teeb tsa turbine rau ntau lub hom phiaj
Rayon ntaub, txhua qhov zoo thiab qhov tsis zoo
Cia mus rau lub khw niaj hnub "Npuag" - peb ob lub qhov muag khiav dav, peb ua tsis taus pa raug tshem tawm hauv kev qhuas ntawm qhov peb pom. Yog li yuav ua li cas kom nkag siab qhov ntau xim ntawm cov ntaub ntawm cov khoom sib txawv?
Yam ntxwv, khoom, kev faib tawm thiab hom duab los qhia
Nyob hauv lub neej txhua hnub, daim duab los qhia nyob ib puag ncig peb. Feem ntau, lub koom haum tsim kho nrog kev ntim khoom noj, khoom ua si, khau, thiab lwm yam. Tab sis qhov tseeb, cov khoom siv no yog siv hauv kev lag luam, kev tsim kho, tsim, luam ntawv thiab lwm yam lag luam. Peb yuav txiav txim siab nyob rau hauv kom meej txog cov hom ntawm cov duab los qhia, nws cov yam ntxwv thiab Scope ntawm daim ntawv thov
Titanium carbide: ntau lawm, muaj pes tsawg leeg, lub hom phiaj, khoom thiab kev siv
Titanium carbide: keeb kwm ntawm kev tshawb pom ntawm qhov sib xyaw no, tshuaj thiab lub cev thiab cov khoom siv kho tshuab. Kev piav qhia ntawm yuav ua li cas kom tau txais nws. Txheej txheej, carbide steel fabrication thiab lwm yam titanium carbide daim ntaub ntawv
Osmosis yog Dab tsi yog thim rov qab osmosis?
Cov kab lus no mob siab rau osmosis - cov txheej txheem pom, uas ua rau dej huv. Lub hauv paus ntsiab lus ntawm kev ua haujlwm thiab ntau yam ntawm cov ntxaij lim dej ua haujlwm ntawm lub hauv paus ntsiab lus ntawm thim rov qab osmosis raug txiav txim siab
OJSC "Lipetsk Metallurgical Cog "Svobodny Sokol": keeb kwm, ntau lawm, khoom
OJSC "Lipetsk Metallurgical Cog "Svobodny Sokol" yog lub tuam txhab qub tshaj plaws hauv nroog Lipetsk, uas tau ua kev zoo siab rau ib puas xyoo ntawm keeb kwm. Kev tsim khoom tshwj xeeb hauv cov khoom tshwj xeeb rau Russia - lub zog muaj zog cam khwb cia hlau dej kav
Daim npe ntawm cov chaw tsim khoom tseem ceeb ntawm Samara
Kev txhim kho kev lag luam ntawm lub teb chaws yog txiav txim siab los ntawm nws cov peev txheej ua lag luam. Cias muab, cov lag luam muaj txiaj ntsig ntau dua, ntau lub teb chaws xa tawm cov khoom. Thiab nrog rau qhov no, kev noj qab haus huv ntawm tib neeg thiab kev siv thev naus laus zis tau loj hlob. Qee hom chaw tsim khoom haum rau ntau tshaj tsib txhiab tus neeg, thiab feem ntau cov no yog cov lag luam tsim kev puas tsuaj. Thaum lub sij hawm lub Soviet Union, cov lag luam tau tsim ua ke nrog cov nroog, thiab cov nroj tsuag hu ua "lub nroog-forming"
Ncua sijhawm rov tsim kho: Dmitrovskoe txoj kev loj
Kev tsim kho ntawm Dmitrovskoye Txoj Kev Loj thiab nws qhov tseem ceeb rau kev thauj mus los ntawm Moscow. Koj paub dab tsi txog hnub ua tiav?
Yuav ua li cas kom zoo anodize aluminium
Cov lus piav qhia ntxaws ntawm cov thev naus laus zis uas tso cai rau koj kom ua tau zoo anodize aluminium. Tsim cov txheej txheem tiv thaiv uas tiv thaiv corrosion ntawm qhov chaw ntawm aluminium profile raws li ib txoj hauv kev los ua kom cov kev pab cuam lub neej ntawm cov qauv
Cua txias thiab qhov cua, cua sov
Rau lub neej ib txwm muaj thiab lub neej ntawm ib tug neeg, nws yog ib qho tsim nyog los tsim thiab tswj xyuas qee yam ntawm ib puag ncig, suav nrog huab cua. Kev hloov pauv hauv qhov kub thiab txias, qhov sib xyaw ntawm cov teeb meem impurities hauv nws cuam tshuam rau kev noj qab haus huv ntawm tib neeg thiab lawv txoj kev noj qab haus huv. Txhawm rau tswj cov yam ntxwv xav tau ntawm huab cua hauv chav, cov cuab yeej tshwj xeeb yog siv
Cov khoom zoo li - nws yog dab tsi thiab vim li cas lawv thiaj xav tau
Yog tias koj xav tau kev teeb tsa lub raj xa dej, koj xav tau fittings. Nws yog dab tsi, vim li cas peb thiaj li xav tau cov khoom zoo li no, hom kev sib txuas dab tsi muaj nyob?
Nroj tsuag "rauj thiab kab mob". Rauj thiab Sickle Factory, Moscow
Metallurgy yuav luag ib txwm yog tus ncej tseem ceeb ntawm peb lub tebchaws, muab cov khoom siv raw khoom xav tau ntau rau kev tsim cov tshuab rau kev lag luam hauv tebchaws, tub rog thiab kev tshawb fawb. Tau kawg, nws txoj kev txhim kho tau dhau los ntawm ntau theem nyuaj, vim tias txhua yam pib thaum lub sijhawm tsaus ntuj
Pob zeb diamond drilling tshuab thiab cov txiaj ntsig tseem ceeb
Txhua xyoo, pob zeb diamond drilling thiab pob zeb drilling yog hloov lwm yam thev naus laus zis. Piv txwv li, ib tug puncher muaj ntau yam tsis zoo, tsis zoo li cov qauv no. Cov no yog vibrations, suab nrov, thiab lwm yam. Feem ntau, xws li drilling yog siv thaum lub sij hawm tsim kho los yog kho cov hauj lwm. Cia peb tham txog lub ntsiab lus no thiab saib dab tsi yog qhov zoo thiab qhov tsis zoo ntawm pob zeb diamond drilling
Cov khoom siv ntawm cov khoom ua cim tsim cov khoom lag luam
Txhawm rau txheeb xyuas qhov zoo tshaj plaws ntawm cov qauv tsim, siv ntau yam kev qhia thiab kev lag luam, ib qho ntawm cov khoom siv ntawm cov khoom siv. Qhov kev ntsuas no tso cai rau koj los ntsuas qib ntawm kev tsim khoom ntawm cov khoom thiab ua raws li cov qauv kev tsim nyog
Hom kev tsim khoom. Lub koom haum ntawm cov txheej txheem ntau lawm
Hom qauv tsim txiav txim siab qhov teeb tsa sab hauv ntawm cov nroj tsuag muaj kev lag luam. Nyob ntawm qhov ntsuas ntawm ntau lawm, hom khoom tsim, homogeneity ntawm cov txheej txheem thev naus laus zis, ntau hom qauv siv hauv kev xyaum
Tsim kev npaj ntau lawm: theem, dej num thiab lub hom phiaj
Kom phim cov txheej txheem tsim khoom kom hloov pauv ib puag ncig, siv cov txheej txheem kev npaj ntawm kev tsim khoom. Kev tsim cov qauv tsim tshiab ntawm cov khoom lossis cov khoom tsim tau raug lees paub los ntawm kev sib xyaw ua ke ntawm cov qauv tsim thiab thev naus laus zis
CALS-technologies yog Lub tswv yim thiab txhais, lub hom phiaj ntawm daim ntawv thov
Kev koom ua ke ntawm kev tsim khoom thiab cov ntaub ntawv thev naus laus zis yog txoj haujlwm tseem ceeb rau kev txhim kho cov lag luam niaj hnub no. Qhov no tso cai rau koj los ua kom cov neeg siv khoom muaj txiaj ntsig ntawm cov khoom lag luam thiab cov txheej txheem thev naus laus zis tshiab
Kev nkag siab qhov profile yog dab tsi
Xav txog qhov profile yog dab tsi, tsis yog txhua tus nkag siab lub ntsiab lus ntawm lo lus. Qhov tseeb, nws tuaj yeem sib txawv heev. Feem ntau lawv txhais tau tias cov qhov rais yas. Tab sis lub Scope ntawm nws siv yog heev loj. Daim ntawv thov ntawm qhov profile yuav nyob ntawm nws hom thiab cov yam ntxwv
Cov kiv cua hauv tsev - txheej txheem cej luam, qauv thiab specifications
Cov kiv cua hauv tsev: piav qhia, nta, hloov kho, duab. Cov kiv cua hauv tsev: txheej txheem cej luam, hom, qauv, specifications. Yuav ua li cas xaiv tus kiv cua hauv tsev?
Aeration nroj tsuag: txhais, hom, lub hauv paus ntsiab lus ntawm kev ua haujlwm, cov nroj tsuag tsim thiab ua-nws-koj tus kheej cov lus qhia
Kev teeb tsa ntawm kab aeration muab rau kev sib txuas ntawm lub twj tso kua mis kom nws muaj ob hom dej ntws tawm - ncaj qha thiab thim rov qab. Kev siv ua ke tso cai rau koj ntxuav cov lim dej kom zoo dua. Nws yog qhov zoo dua los nqa cov av nkos loj dua. Cov ntxaij lim dej me me dhau los ua txhaws hauv ib lub sijhawm luv luv thiab yuav tsum tau yaug ntau zaus. Nws yog qhov zoo dua los siv lub khob iav
Txoj kab xev: cov khoom tshwj xeeb thiab daim ntawv thov
Cov kab xev siv zog tau mus txog qhov siab tshaj plaws hauv xyoo tas los no. Kev siv yog tsim nyog rau ntau yam kev tsim kho, nrog rau kev ntim khoom thiab kev tsim cov khoom siv hauv tsev
White cam khwb cia hlau: khoom, kev siv, qauv thiab nta
Thawj chiv keeb, thev naus laus zis ntawm cov hlau casting yog thawj zaug hauv Suav teb xyoo pua 10th, tom qab ntawd nws tau nthuav dav mus rau lwm lub tebchaws hauv ntiaj teb. Ib tug neeg sawv cev tseem ceeb ntawm xws li ib tug alloy yog dawb cam khwb cia hlau, uas yog siv nyob rau hauv mechanical engineering rau kev tsim khoom, nyob rau hauv kev lag luam thiab nyob rau hauv lub neej txhua hnub
Roll: piav qhia, ntau lawm technology thiab factories
Roll yog ib qho tseem ceeb ntawm lub tshuab dov. Yog li ntawd, qhov zoo ntawm cov khoom tau txais nyob ntawm seb cov yam ntxwv ntawm cov yob
Foob pob hluav taws-torpedo "Dej Dej tsaws tsag": yam ntxwv, chaw tsim khoom. RPK-6M "Dej"
Foob pob hluav taws-torpedo "Dej Dej tsaws tsag": piav qhia, nta, chaw tsim khoom, duab. RPK-6M "Dej Dej tsaws tsag": yam ntxwv, keeb kwm ntawm creation, lub hom phiaj
Flanged pob valve - piav qhia, daim ntawv thov, nta thiab tshuaj xyuas
Flanged li qub yog kaw-tawm li qub, kev siv uas tau dhau los ua qhov yooj yim thiab yooj yim uas nrog lawv cov tsos ntawm cov li qub tau poob qis heev
Kev tsim kho thiab nres li qub: hom thiab lub hom phiaj
Hnub no, ntau hom kev txhim kho lub tsev tau tsim. Nws tuaj yeem raug cais raws li kev tsim khoom lossis daim ntawv thov, lossis raws li cov khoom siv hauv kev tsim khoom. Reinforcement, lub thickness uas tsis pub tshaj 10 hli, yog muag nyob rau hauv coils. Yog hais tias nws txoj kab uas hla ntawm qhov profile yog ntau tshaj 10 hli, nws yog txiav mus rau hauv tuav 6-12 m ntev
Steel 95x18: yam ntxwv, tshuaj xyuas, kho cua sov thiab ua riam
Cov riam zoo li cas yog ua los ntawm? Yuav ua li cas ua raws li lawv raug? Cov khoom no muaj dab tsi? Nyeem txog qhov no (thiab ntau ntxiv) hauv peb tsab xov xwm
Steel 10 yog dab tsi?
Raws li koj tuaj yeem pom los ntawm txhua hom hlau thiab hlau alloy, steel 10 yog cov khoom siv hluav taws xob qis. Qhov ntawd yog yuav ua li cas nws yog hu ua nyob rau hauv tag nrho cov ntaub ntawv technical, tab sis qee zaus nws lub npe yog abbreviated nyob rau hauv ib tug txawv txoj kev, namely ST 10. Tab sis ib txoj kev los yog lwm yam, nws lub npe - tag nrho thiab abbreviated - qhia peb ntau heev
Cov twj siab siab rau dej: hom, nta thiab tshuaj xyuas
Hnub no, ib tug tsis tuaj yeem ua tsis muaj dej hauv txhua qhov ntawm tib neeg lub neej. Tab sis cov dej hauv nruab nrab tsis muaj nyob hauv txhua lub zos hnub so thiab cov chaw ntiav. Txawm hais tias muaj cov txheej txheem zoo li no, nyob rau lub caij ntuj sov nws tsis tuaj yeem siv cov ntsiab lus ntawm cov dej kom tsawg, vim tias tsuas yog tsis txaus siab. Tab sis lub twj tso kua dej daws qhov teeb meem no
Ntsia hlau xovxwm: piav qhia ntawm tus tsim, lub hauv paus ntsiab lus ntawm kev ua haujlwm thiab cov txheej txheem ntawm kev rho tawm
Screw xovxwm tau dhau los ua neeg nyiam dua tsis ntev los no. Qhov no yog vim lub fact tias cov cuab yeej no pab kom tau cov roj los ntawm ntau yam qoob loo yam tsis muaj teeb meem. Nws yog nquag siv tsis tau tsuas yog nyob rau hauv industrial scale, tab sis kuj rau private lub hom phiaj
Ntaus, lub hauv paus ntsiab lus ntawm kev ua haujlwm thiab daim duab ntawm tus choj rectifier diode
Hloov hluav taws xob tam sim no hloov mus rau hauv qhov kev hloov pauv tas li los ntawm kev siv cov hluav taws xob tshwj xeeb - diode txuas hniav. Lub rectifier diode choj Circuit Court muab faib ua 2 versions: ib-theem thiab peb-theem
Vuam inverter "Svarog ARC 205": piav qhia, specifications, nqi, tshuaj xyuas
Lub cuab yeej "Svarog ARC 205" feem ntau yog tsim los rau kev ua haujlwm lossis kev ua haujlwm ntau hauv lub neej txhua hnub. Rau qee lub sijhawm siv, koj tuaj yeem yuav tus qauv pheej yig dua thiab yooj yim dua nrog tsawg dua nta
Table of loads by cable section: xaiv, xam
Txhawm rau tiv thaiv cov xaim hluav taws xob los ntawm overheating thaum cov ntsuas tam sim no dhau mus ntev, cov kab hla hla yog xam los ntawm cov kev tso cai mus sij hawm ntev. Kev suav yog yooj yim yog tias lub rooj thauj khoom rau cov kab hluav taws xob tau siv. Cov txiaj ntsig tau raug ntau dua yog tias qhov kev suav ua raws li qhov siab tshaj plaws tam sim no load
Kaw thiab qhib cua sov: nta, qhov tsis zoo thiab qhov zoo
Tam sim no, nws tau cog lus tias yuav nthuav qhia cov cuab yeej siv hluav taws xob kaw rau cov neeg siv khoom. Cov dej kub tso cai rau koj los txhim kho qhov zoo ntawm cov dej nkag mus rau theem ntawm cov dej haus. Txawm hais tias cov thev naus laus zis tshiab yog kev txuag nyiaj thiab txo cov pa tawm hauv huab cua, lawv xav tau kev nqis peev tseem ceeb. Txoj hauv kev ntawm kev siv yog nyob ntawm tus nqi ntawm kev lag luam thiab kev siv nyiaj txiag, kev sib tw rau cov peev txheej thiab lwm yam xwm txheej
Ultrafiltration dej yog dab tsi?
Ultrafiltration dej los ntawm daim nyias nyias tso cai rau koj ua tiav nws qhov kev xav tau purity nrog qhov tsawg kawg nkaus ntawm cov tshuaj reagents. Cov dej khib nyiab tom qab kev kho mob tuaj yeem siv rau kev lag luam. Ultrafiltration tsis yog ib txwm siv tau. Txoj kev tsis tso cai tshem tawm qee yam tshuaj, piv txwv li, organochlorine tebchaw thiab qee cov humic acids. Hauv cov xwm txheej zoo li no, kev tu ntau theem yog siv
Kev Tiv Thaiv Cathodic: Daim Ntawv Thov thiab Cov Qauv
Kev tiv thaiv Cathodic yog ib txoj hauv kev los txhim kho kev ua haujlwm kev ntseeg siab ntawm cov kav dej hauv av thiab lwm yam qauv. Nyob rau tib lub sijhawm, nws qhov kev cuam tshuam tsis zoo rau cov kav dej uas nyob ib sab los ntawm kev cuam tshuam ntawm cov dej ntws tsis zoo yuav tsum raug coj mus rau hauv tus account
HDPE yeeb nkab: ua-nws-koj tus kheej installation, installation nta thiab cov lus qhia
Thaum HDPE yeeb nkab raug teeb tsa, kev teeb tsa yog ua tiav los ntawm vuam lossis compression fittings. Yog tias cov kev cai ntawm kev teeb tsa tau ua raws, cov kev sib txuas yuav yog airtight thiab ruaj khov rau ntau xyoo
Cable tracing yog dab tsi?
Trace tso cai rau koj los txiav txim siab cov kev taw qhia thiab qhov chaw ntawm cov khoom txuas ntxiv zais, feem ntau yog cov cables. Nws yog ib qho tseem ceeb kom raug teeb tsa qhov ntim theem ntawm lub transmitter thiab receiver. Kev saib xyuas tshwj xeeb yog kos rau qhov chaw ntawm nws qhov kev hloov pauv
Cov qib carbon steel. Classification, GOST, daim ntawv thov
Hlau yog cov khoom siv hlau metallurgy, cov khoom siv tseem ceeb. Nws yog siv los tsim kev tsim kho fittings, dov hlau cov khoom ntawm ntau yam profiles, kav dej, qhov chaw, mechanisms, cuab yeej
Leningrad NPP: keeb kwm. Lub zog ntawm Leningrad NPP
Leningrad NPP tso cai rau ntau lab tus tib neeg hauv thaj av kom nyob kaj siab lug. Txawm tias muaj tseeb hais tias lub atom nyob kaj siab lug yog txaus ntshai, qhov chaw nres tsheb tau ua tiav kev ua hauj lwm rau ntau tshaj plaub caug xyoo
Galvanized yob: piav qhia, specifications thiab tshuaj xyuas. Chain-link mesh galvanized nyob rau hauv ib yob
Galvanized kauj yog cov ntawv hlau ntev uas siv rau ntau lub hom phiaj. Galvanized steel yog tsim nyob rau hauv daim ntawv no ntawm txhua yam tsis muaj thiab qhov ntau thiab tsawg. Specifications qhia txog kev ua haujlwm thiab thaj chaw siv
Puas lub rooj zaum lub tsheb puas phem tiag tiag?
Ib tsab xov xwm hais txog ib qho ntawm cov cim ntawm kev thauj neeg caij tsheb ntawm Soviet era, uas tau los ua lub tsheb tshwj xeeb, ib qho kev tsim tshwj xeeb ntawm cov kws tshawb fawb kev thauj mus los ntawm lub teb chaws loj uas ploj mus los ntawm daim ntawv qhia kev nom kev tswv hauv ntiaj teb
MiG-31BM: specifications. MiG-31: qhov zoo tshaj plaws ntawm txhua tus yam ntxwv
Lub MiG-31BM fighter raug suav hais tias yog qhov zoo tshaj plaws fighter-interceptor tsis tau tsuas yog nyob rau hauv Russia, tab sis kuj nyob rau hauv lub ntiaj teb no. Qhov no ua tau ua tsaug rau qhov kev ua tau zoo dua qub thiab cov yam ntxwv radar ntawm lub dav hlau
Tu-95MS "Bear" lub foob pob hluav taws
Tu-95MS "Yuav" yog cov xeeb leej xeeb ntxwv ntawm "Aircraft-95-1", uas thawj zaug coj mus rau saum huab cua thaum lub caij nplooj zeeg xyoo 1952. Kev ua haujlwm hauv cov davhlau ya nyob twg tau pib xyoo 1956, nyob ib puag ncig tib lub sijhawm uas nto moo B-52 tau tshwm sim hauv Asmeskas, uas tseem ua haujlwm niaj hnub no
Kev faib cov nkoj ntawm Lavxias Navy: piav qhia, hom thiab qib
Kev faib tawm ntawm cov nkoj ntawm Lavxias Navy yog cov ncauj lus kom ntxaws thiab voluminous. Nws suav nrog qeb, chav kawm, subclasses. Thiab txhua qhov chaw - ntawm ntau lub npe. Txhua lub nkoj suav nrog hauv kev faib tawm muaj tus yam ntxwv loj heev. Thiab lub ntsiab lus no yog qhov nthuav tiag tiag. Thiab txhawm rau kom tsawg kawg pib nkag siab nws me ntsis, koj yuav tsum tham luv luv txog txhua qib thiab hais txog cov txheej txheem uas muaj cov yam ntxwv zoo tshaj plaws
Cov khob cij tsis xws luag: duab, ua rau, teeb meem ci thiab yuav kho li cas
Ua khob cij yog txheej txheem thev naus laus zis. Tsis xav tsis thoob, cov khoom bakery tiav tuaj yeem muaj ntau yam tsis xws luag. Lawv tuaj yeem tshwm sim los ntawm qhov tsis zoo ntawm cov khoom siv raw, ua yuam kev ntawm tus neeg ua mov ci uas kneads lub khob noom cookie thiab ci. Nws yog ib qho tsim nyog sau cia tias qhov tsis zoo uas cuam tshuam nrog qhov zoo ntawm cov khoom xyaw yog qhov nyuaj heev los kho, thaum thev naus laus zis tuaj yeem kho. Kab lus qhia txog qhov tsis xws luag ntawm qhob cij thiab yuav ua li cas tshem tawm lawv
Dab tsi yog lub zog siab bolts?
Muaj ntau qhov kev faib tawm ntawm cov khoom siv bolted, tab sis hais txog kev ruaj ntseg fastening, qhov tseem ceeb tshaj plaws faib raws li qib ntawm kev tiv thaiv lub cev muaj zog. Lub functional stability thiab durability ntawm lub hom phiaj qauv nyob ntawm seb cov khoom no. Qhov txaus nyiam tshaj plaws hauv qhov no yog cov bolts uas muaj zog siv hauv cov tsheb, cov tsev lag luam thiab cov tsev tsim khoom tseem ceeb
Tshuaj lom neeg cov khoom: lub tswv yim, kev faib tawm thiab cov yam ntxwv
Tshuaj phom sij yog ib qho tseem ceeb thiab koj yuav tsum paub "los ntawm qhov muag" thiaj li paub qhov kev phom sij uas koj nyob, nyob ze rau lawv
Elevator yog Dej dav hlau of elevator. Cua sov of elevator
Lub elevator yog ib qho khoom siv uas tsim nyog los txo qhov kub ntawm cov coolant nkag mus rau hauv cov tsev nyob. Cov cuab yeej no txo qhov kub ntawm cov dej los ntawm kev sib xyaw nrog cov kua txias los ntawm cov yeeb nkab rov qab. Tam sim no, dej dav hlau elevator tsis muaj nyob hauv txhua CHP. Cia peb ua tib zoo saib seb lub cuab yeej no yog dab tsi, nws ua haujlwm li cas thiab seb nws puas tsim nyog rau nruab nws. Peb kuj tseem yuav xav txog lwm hom of elevator
Kev lag luam ntawm Is Nrias teb. Kev lag luam thiab kev ua liaj ua teb hauv Is Nrias teb
Ib lub teb chaws loj hlob tshaj plaws hauv ntiaj teb niaj hnub no yog Is Nrias teb. Kev lag luam thiab kev ua liaj ua teb feem ntau yog nyob hauv xeev. Lub luag haujlwm ntawm cov cheeb tsam no hauv kev tsim GDP yog qhov tseem ceeb
Kev txav ntawm pob zeb: hom, rooj, GOST thiab nta
Tam sim no, ib qho ntawm cov khoom siv hauv tsev feem ntau yog pob zeb sib xyaw. Nrog kev pab los ntawm cov khoom siv raw, ntau yam khoom tsim. Nws muaj ntau qhov sib txawv thiab cov yam ntxwv, ntawm cov uas muaj ib qho hu ua kev txav ntawm pob zeb
AZLK Tsheb cog: keeb kwm ntawm kev tsim, cov khoom lag luam thiab qhov tseeb nthuav
AZLK tsob nroj hauv Moscow tsim kev ywj pheej minicars "Moskvich" rau cov neeg tsav tsheb hauv tsev thiab txawv teb chaws. Lub tuam txhab no nyob rau hauv ib lub sij hawm tswj kom sau cov lag luam nrog cov nqi pheej yig tsheb uas tau txais kev lees paub nrov. Niaj hnub no, kev cob qhia tshiab tau tsim nyob rau thaj tsam ntawm AZLK rau kev ua haujlwm sib txawv
Laminated plywood: Scope
Laminated plywood tau pom ntev los ntawm cov neeg uas tab tom nrhiav rau cov khoom muaj zog, hnav-tiv taus thiab ruaj khov. Cov tsos ntawm lub rooj tsavxwm no tso cai rau nws siv tsis tau tsuas yog hauv kev tsim kho, tab sis kuj nyob rau hauv kev tsim cov rooj tog
Likinsky Bus Plant LIAZ
Likinsky Bus Plant (LIAZ) tau ua tus thawj coj hauv kev tsim cov tsheb npav loj thiab loj hauv chav kawm ntau xyoo. Lub tuam txhab cov khoom lag luam suav nrog ntau tshaj li kaum tawm qauv ntawm kev thauj mus los rau pej xeem, suav nrog trolleybuses. Nyob rau xyoo 2005, lub koom haum tau los ua ib feem ntawm GAZ Group ntawm Tuam Txhab, uas ua rau nws muaj peev xwm rov txhim kho lub hauv paus tsim khoom thiab teeb tsa cov khoom siv hauv ntiaj teb
Txoj kev tsheb ciav hlau yog Txhais, tswvyim, yam ntxwv thiab qhov ntev. Tsheb ciav hlau qhov ntev thiab cov yam ntxwv ntawm cov chaw khiav haujlwm
Kev mus los ntawm tsheb ciav hlau hla lub nroog thiab cov nroog, koj tuaj yeem kawm ntau yam nthuav thiab lom zem txog lub ntiaj teb ntawm txoj kev tsheb ciav hlau. Ntau tshaj ib zaug, cov neeg taug kev tau nug lawv tus kheej cov lus nug txog qhov twg qhov no lossis txoj kev tsheb ciav hlau coj mus? Thiab tus engineer uas tswj lub tsheb ciav hlau xav li cas thaum lub tsheb ciav hlau pib tawm lossis tuaj txog ntawm qhov chaw nres tsheb? Yuav ua li cas thiab los ntawm qhov twg cov tsheb hlau txav thiab txoj hauv kev ntawm cov khoom dov yog dab tsi?
"Ikarus 250": specifications thiab duab
Lub xeev Soviet loj hlob nyob rau ib zaug yog qhov xav tau ntawm cov tsheb npav loj thiab xis nyob. Cov pej xeem tsis muaj kev thauj mus los ntawm tus kheej ntau heev, thiab yog li ntawd kev mus los ntev yog suav tias yog ib qho teeb meem. Cov nroj tsuag Hungarian Ikarus tuaj yeem pab dawb, qhov chaw lawv pib tsim cov lus dab neeg Ikarus 250
Kev hloov pauv hloov pauv: kev piav qhia
Kev hloov pauv hloov pauv rau lub chaw ua haujlwm lossis thaj chaw muag khoom yog cov cuab yeej zoo tshaj plaws rau kev sib txuas lossis zoning qhov chaw thaum koj xav tau tig chav me rau hauv qhov chaw ua haujlwm mini lossis chav sib tham hauv ob peb feeb
Kev teeb tsa lub tshuab hluav taws xob: cov lus qhia kws tshaj lij
Kev teeb tsa lub tshuab hluav taws xob yog ib txwm ua raws li cov cai rau kev teeb tsa lub tshuab hluav taws xob (PUE), nrog rau raws li cov lus qhia ntawm cov chaw tsim khoom. Tsis tas li ntawd, yog tias lub cuab yeej muaj qhov loj me me, ces nws yog ib qho tsim nyog yuav tsum tau tshwj xeeb equip lub hauv paus rau nws
Paronite gasket: yam ntxwv, ntau yam thiab muaj peev xwm
Paronite nplhaib gasket yog cov khoom sib khi ua los ntawm asbestos, uas yog tsim los tsim kom muaj kev sib txuas nruj hauv cov kav dej. Vim nws cov khoom, cov khoom no yog nyob rau hauv siab xav tau ntawm cov lag luam thiab cov pej xeem
Flying aircraft carrier: piav qhia, yam ntxwv thiab keeb kwm ntawm kev tsim
Ib lub dav hlau ya dav hlau yog ib lub dav hlau uas muaj peev xwm nqa tau ntau lub dav hlau me me uas tsim los rau kev sib ntaus sib tua huab cua
Lwm qhov chaw siv hluav taws xob hauv Belarus. Roj thiab hluav taws xob cov peev txheej ntawm Belarus
Qhov teeb meem ntawm kev tsis txaus ntawm cov peev txheej hluav taws xob tam sim no tau nce mus txog theem ntawm qhov teeb meem ntawm kev hloov pauv huab cua, thiab, raws li koj paub, keeb kwm ntawm noob neej yog keeb kwm ntawm kev tawm tsam rau kev siv hluav taws xob. Ib qho xwm txheej zoo sib xws tau pom nyob rau hauv lub xyoo pua 21st (piv txwv li, kev tsov kev rog hauv Middle East rau roj)
Bryansk Engineering cog yog qhov txaus siab ntawm thaj av
CJSC "Bryansk Machine-Building Plant" tsis yog tsuas yog lub tuam txhab tsim khoom qub tshaj plaws hauv cheeb tsam Bryansk, tab sis kuj yog ib lub lag luam ntev tshaj plaws nyob rau hauv Russia. Yuav ua li cas ib lub tuam txhab nrhiav tau nyob rau hauv lub thib ob ib nrab ntawm lub xyoo pua thib kaum yim tswj kom nyob twj ywm ntawm cov feem ntau cog lus manufacturers thiab tsim cov khoom uas muaj feem xyuam rau lub ntiaj teb no niaj hnub no yog piav nyob rau hauv tsab xov xwm no
JSC "Nizhny Novgorod Tshuab-Lub Tsev Cog": keeb kwm thiab ntau lawm
JSC "Nizhny Novgorod Machine-Building Plant" yog ib lub tuam txhab loj tshaj plaws hauv lub tebchaws tiv thaiv kev lag luam. Lub tuam txhab tau los ua nto moo rau kev tsim thiab tsim cov artillery systems. Niaj hnub no, NMZ tsim cov khoom siv tub rog-txheej txheem, nrog rau cov reactors thiab cov khoom siv rau cov chaw tsim hluav taws xob nuclear, suav nrog cov nkoj nrog lub tshuab hluav taws xob nuclear
Yuav ua li cas gantry cranes tsim thiab siv
Gantry cranes yog ib yam ntawm cov nyiaj siv ua haujlwm cranes. Cov cuab yeej siv zoo li no tau siv ntau thaj chaw ntawm kev lag luam hauv tebchaws. Feem ntau, cov qauv zoo li no tau teeb tsa hauv warehouses, qhib cov chaw tsim khoom lag luam, hauv cov chaw nres nkoj, thiab lwm yam. Ib qho ntawm feem ntau siv hom lifting khoom
Kev tsim kho hluav taws xob hauv Crimea. Lub zog ntawm Crimea
Tsab ntawv qhia yuav ua li cas cov tub ceev xwm Lavxias daws qhov teeb meem nrog lub zog ntawm Crimea tom qab nws nkag mus rau Lavxias Federation. Cov neeg nyeem yuav paub seb lub xeev Crimean lub zog yog dab tsi nyob rau hauv 2014, yog vim li cas nws thiaj li yuav tsum tau ceev nrooj tsim fais fab nroj tsuag nyob rau hauv Crimea
Cov xauv ruaj ntseg: kev faib tawm, hom, hom, chav kawm thiab tshuaj xyuas
Zaj lus no mob siab rau cov xauv ruaj ntseg. Cov hom khoom siv, cov chav kawm, nrog rau kev tshuaj xyuas ntawm cov tuam ntxhab ntawm cov khoom siv kaw lus raug txiav txim siab
Rosin yog ib yam khoom nthuav heev
Rosin yog ib qho amorphous, nkig nrog cov qauv vitreous thiab xim ntawm lub teeb daj mus rau tsaus liab. Nws yog tau tom qab distillation ntawm volatile tivthaiv los ntawm resins ntawm coniferous ntoo. Cov khoom siv tshuaj lom neeg ntawm rosin (txog 90% resin acids, suav nrog lub ntsiab - abietic) ua rau nws insoluble hauv dej, tab sis soluble hauv ethers, cawv, chloroform thiab benzene
Ziab ntoo thiab nws cov nta
Yuav kom cov khoom ntoo kom ruaj khov thiab khaws lawv qhov qub qub, kev ziab ntoo yog qhov tsim nyog, uas muaj ntau yam nta
Cov kav dej hauv av (duab)
Cov kav dej hauv av tuaj yeem yog cov tais diav, asbestos-cement lossis ceramic. Cov tais diav thiab cov khoom siv ceramic tau siv rau hauv cov txheej txheem ntawm kev ua liaj ua teb ntawm thaj chaw. Txawm li cas los xij, cov kav dej no muaj ntau qhov tsis zoo, lawv yog qhov xav tau kom nquag plias, nrog rau kev pab cuam lub neej yam tsawg kawg nkaus
Baikal-Amur Mainline: cov chaw thauj khoom loj. Kev tsim kho ntawm Baikal-Amur Mainline
Lub Baikal-Amur Mainline yog ib qho ntawm cov haujlwm tseem ceeb tshaj plaws uas tau ua nyob rau xyoo pua 20th. Tau ntau xyoo ntawm kev ua haujlwm ntawm ntau ntu ntawm txoj kev, ntau dua 20 lab tus tib neeg tau ua haujlwm, kev tsim kho txoj kev tau dhau los ua kev tsim kho kim tshaj plaws thaum lub sijhawm USSR
Baikal ib puag ncig: rov tsim kho (duab)
Txoj kev Baikal yog ib txoj kev tseem ceeb ntawm txoj kev loj, txoj kev luv tshaj plaws ntawm lub nroog mus rau Lake Baikal. Nws cov kev tsim kho dua tshiab, uas tau ua tiav thaum Lub Kaum Hli 2015, ua kom nws muaj kev nyab xeeb thiab yooj yim li sai tau
Boeing 737-800 airliner rau kev thauj neeg caij dav hlau hla qhov nruab nrab
Boeing "737-800" yog lub dav hlau nrov thiab nrhiav-tom qab kev thauj huab cua ntawm cov neeg caij tsheb ntawm txoj kev nruab nrab
Neeg nrog caij dav hlau Boeing 757-200
Ua tiav, kev txhim kho ntawm Boeing 757 lub dav hlau pib thaum Lub Yim Hli 1978. Lub dav hlau Boeing 757-200 yog tsim los ntawm American tuam txhab Boeing es tsis txhob ntawm lub Boeing 727 qauv. Lub dav hlau tshiab yog npaj rau kev ua hauj lwm nyob rau hauv domestic airlines, raws li zoo raws li nyob rau hauv lub thoob ntiaj teb flights ntawm lub teb chaws USA thiab Europe