Kev lag luam 2024, Cuaj hlis
Kev tsim cov plywood: thev naus laus zis, theem tseem ceeb ntawm cov txheej txheem thiab thaj chaw ntawm kev siv cov khoom siv
Plywood yog ib qho ntawm cov khoom siv pheej yig tshaj plaws thiab siv tau tshaj plaws. Txawm hais tias muaj ntau txheej txheej, nws yooj yim rau nruab thiab tuaj yeem ua tiav hauv tsev yam tsis muaj cov cuab yeej tshwj xeeb. Txuj kev tsim cov plywood suav nrog kev siv cov ntoo lamellas, nrog rau kev ua kom zoo uas koj tuaj yeem tau txais cov khoom tiav uas tiv taus ntau yam kev hem thawj
Cement slurry: cov khoom, kev npaj cov cai, muaj pes tsawg leeg, ua raws li GOST cov cai, lub hom phiaj thiab daim ntawv thov
Thaum lub sijhawm drilling, cov kev daws teeb meem tshwj xeeb yog siv los tshem tawm cov txiav thiab cov khoom los ntawm kev txhim kho pob zeb hauv zos. Qhov kev ua haujlwm no yog qhov tsim nyog los ua kom muaj kev ua tau zoo ntawm cov neeg kho tshuab kev cuam tshuam ntawm qhov drilling rig thiab tshem tawm qhov hauv qab. Kev ntxuav tawm yog nqa tawm siv cov cement slurries, uas tau npaj siv cov thev naus laus zis tshwj xeeb
Open-hearth rauv thiab nws qhov tseem ceeb hauv kev tsim steel
Lub qhov cub qhib-hearth, tsim nyob rau hauv nruab nrab ntawm lub xyoo pua ua ntej kawg, ua rau muaj kev hloov pauv tiag tiag thiab kev siv thev naus laus zis hauv kev lag luam ferrous metallurgy. Muaj lub sijhawm rau kev tsim cov hlau ntawm kev lag luam. Qhov no yog qhov pib ntawm txoj kev loj hlob sai ntawm mechanical engineering. Ntau yam khoom thiab cov txheej txheem uas peb niaj hnub siv, tsis xav txog keeb kwm ntawm lawv cov creation, pib lawv txoj kev mus rau hauv lub hearth ntawm lub qhov cub qhib-hearth
Pib ntau lawm: piav qhia
Kev tsim cov kav dej sib txawv nyob ntawm cov khoom siv, npaj siv cov khoom, txoj kab uas hla, profile, txoj kev sib txuas thiab lwm yam khoom siv thev naus laus zis. Xav txog cov yam ntxwv ntawm kev tsim cov khoom no thiab lawv cov yam ntxwv luv luv
Compressor units: txhais ntawm lub tswvyim, qhov zoo thiab qhov tsis zoo
Compressor units yog siv los ua cov khoom siv pneumatic. Muaj ntau hom qauv. Lawv txawv nyob rau hauv kev tsim thiab parameters
Mechanization thiab automation ntawm cov txheej txheem ntau lawm
Automation ntawm kev tsim khoom thiab cov txheej txheem thev naus laus zis yog txheej txheem uas tswj hwm thiab tswj kev ua haujlwm los ntawm tus neeg raug xa mus rau cov cuab yeej thiab khoom siv. Qhov no ua rau muaj kev nce ntxiv hauv kev tsim khoom thiab cov khoom zoo
Kev ntseeg yog Kev ntseeg siab. Kev ntseeg tau zoo
Tus txiv neej niaj hnub no tsis tuaj yeem xav txog nws lub neej yam tsis muaj ntau yam kev ua haujlwm uas yooj yim rau lub neej thiab ua kom muaj kev nyab xeeb dua
Riam phom-qib plutonium: daim ntawv thov, tsim khoom, pov tseg
Riam phom-qib plutonium yog ib yam khoom uas koj tuaj yeem tsim riam phom muaj zog tshaj plaws hauv ntiaj teb. Peb yuav tham txog nws hauv kab lus no
Wheel sets wagons. Kev ua haujlwm tsis zoo ntawm lub log teeb ntawm railway wagons
Cov kab lus no mob siab rau kev ua haujlwm tsis zoo ntawm cov log tsheb hauv kev tsheb ciav hlau. Piav qhia txog ntau hom kev hnav thiab deformation, nrog rau cov nuances ntawm kev tu thiab kho
Voronezh Nroj Tsuag: txheej txheem cej luam, chaw nyob, khoom lag luam, tshuaj xyuas cov neeg ua haujlwm
Voronezh kev lag luam paub rau tib neeg tsis yog hauv thaj av xwb, tab sis thoob plaws CIS. Niaj hnub no peb yuav tham txog cov neeg sawv cev tseem ceeb tshaj plaws ntawm kev lag luam hauv lub peev ntawm thaj av Dub ntiaj teb, nrog rau lawv cov khoom thiab qhov chaw
Ceramic Hoobkas hauv Voronezh: chaw nyob, keeb kwm, khoom
Ceramic cog hauv Voronezh yog lub lag luam rau kev tsim cov vuas thiab lwm yam khoom. Nws tau muaj nyob rau ntawm thaj chaw ntawm lub nroog rau ntau tshaj 50 xyoo, tab sis tseem, rau ntau tus neeg nyob hauv nroog, kev ua haujlwm ntawm cov nroj tsuag yog shrouded nyob rau hauv ib daim ntaub thaiv ntawm secrecy. Niaj hnub no peb yuav qhia koj tias lub tuam txhab nyob qhov twg, nws tsim dab tsi thiab cov theem ntawm nws lub neej nws tau dhau mus
Gribanovskiy qab zib Hoobkas: chaw nyob, keeb kwm, khoom, kev sib cuag
Gribanovskiy qab zib Hoobkas tuaj yeem raug hu ua lub nroog tsim kev lag luam. Nws nyob hauv cheeb tsam Voronezh thiab yog qhov chaw ua haujlwm tseem ceeb rau feem ntau ntawm cov pej xeem ntawm lub zos Gribanovsky. Peb yuav qhia txog cov khoom thiab keeb kwm ntawm cov nroj tsuag hauv peb cov khoom
Ua dej khov qhuav hauv tsev
Sab nraud, carbon dioxide tiag tiag zoo li cov dej khov zoo tib yam (li no lub npe). Cov dej khov qhuav qhuav yog ze rau -79˚С. Nws "melted", absorbing 590 kJ / kg. Tsis muaj tshuaj lom
Leej twg pom qhov tshwm sim ntawm roj hmab vulcanization, thiab nws yog dab tsi?
Leej twg nrhiav tau qhov tshwm sim ntawm roj hmab vulcanization, tsis yog txhua tus paub. Txawm hais tias lub npe ntawm tus neeg no feem ntau hais hauv cov lus tshaj tawm. Nws lub npe yog Charles Nelson Goodyear, thiab niaj hnub no cov log tsheb ntawm ib lub npe nrov nqa nws lub npe. Yog tsis muaj nws txoj kev koom tes, "Indian roj hmab" (rubber) yuav tsis tau siv dav, vim nws tsuas yog xav paub ib zaug coj los ntawm Asmeskas
Foamed polyethylene. Hais txog cov yam ntxwv ntawm cov khoom siv
Kab lus no hais txog cov khoom ntawm polyethylene ua npuas ncauj. Tom qab tag nrho, lawv txiav txim siab seb cov khoom siv yuav siv li cas thiab qhov twg. Tsis tas li ntawd, cov ntaub ntawv ntxiv yog muab rau ntau yam ntawm cov khoom siv rau ntau yam tsis muaj, uas tuaj yeem pab tau rau txhua tus neeg
Epoxy resin: tus pabcuam tseem ceeb hauv txhua qhov kev lag luam
Epoxy resin yog ib yam khoom uas muaj kev tiv thaiv zoo rau cov kua qaub, halogens thiab alkalis. Qhov no yog hluavtaws oligomer. Nws tuaj yeem siv los nplaum yuav luag txhua yam khoom siv
Hom cam khwb cia hlau, kev faib tawm, muaj pes tsawg leeg, khoom, cim thiab daim ntawv thov
Cov hom cam khwb cia uas muaj nyob niaj hnub no tso cai rau ib tus neeg los tsim ntau yam khoom. Yog li ntawd, peb yuav tham txog cov ntaub ntawv no nyob rau hauv kom meej ntxiv nyob rau hauv tsab xov xwm no
Roj Hmab O-rings (GOST)
Roj hmab o-rings yog tsim los kaw kev sib txuas ntawm ntau qhov chaw, ob qho tib si ruaj thiab txav mus. Cov khoom no kuj siv rau hauv kev tsim kho ntawm hydraulic thiab pneumatic units thiab cov khoom siv. Dab tsi ntawm O-rings muaj?
Thermal expansion valve: lub hauv paus ntsiab lus ntawm kev ua haujlwm, khoom siv thiab cov yam ntxwv
Hnub no, cov khoom siv thermostatic expansion valve tau siv ntau yam khoom siv. Nrog lawv cov kev pab, koj tuaj yeem kho qhov kub thiab txias hauv chav nyob, lawv tuaj yeem muab ntxiv rau kev tsim cov kais dej, siv hauv lub tshuab cua txias, thiab lwm yam
Stainless steel corrugated yeeb nkab - txheej txheem cej luam, nta, specifications thiab hom
Cov kab lus tau mob siab rau cov kav hlau tsis muaj steel corrugated. Cov yam ntxwv ntawm cov khoom, lawv cov nta, hom, nuances ntawm installation, thiab lwm yam
Asbestos-cement yeeb nkab: qhov ntau thiab tsawg thiab hom
Asbestos-cement yeeb nkab: piav qhia, hom, qhov ntau thiab tsawg, nta. asbestos-cement yeeb nkab: yam ntxwv, duab, txoj kab uas hla
AISI 304: cov khoom, yam ntxwv, muaj pes tsawg leeg
Kab lus no yog qhov chaw khaws cia ntawm cov ntaub ntawv tseem ceeb tshaj plaws txog kev ua haujlwm zoo li steel thiab metallurgy. Tab sis tsis zoo li cov lus qhuav, uas feem ntau tsis tuaj yeem nkag siab rau tus neeg nruab nrab uas tsis muaj kev kawm qib siab hauv metallurgy, tag nrho cov ntaub ntawv muaj nyob rau hauv tsab xov xwm no tau nthuav tawm ntau cov lus yooj yim kom txhua tus tuaj yeem nkag mus rau hauv cov ntaub ntawv. lub ncauj lus, ua neeg nyiam, thiab yav tom ntej delve rau hauv nws me ntsis tob
AISI 430: yam ntxwv, analogue
Tsuas yog cov hlau tsis zoo hlau tsuas yog tso cai hauv kev lag luam khoom noj. Qhov no yog vim tsis tsuas yog cov kev cai nruj, tab sis kuj rau kev xav. Rau cov laj thawj no, AISI 430 steel tau dhau los ua neeg nyiam heev hauv kev lag luam tshwj xeeb no
Kev lag luam qhov cua: nta, kev xaiv kev teeb tsa thiab tshuaj xyuas
Kev lag luam qhov cua yog txheej txheem uas nws lub hom phiaj yog ua raws li cov txheej txheem thev naus laus zis thiab kev nyiam huv hauv kev tsim khoom, suav nrog huab cua hauv chaw ua haujlwm
Aspiration systems: xam, installation. Kev tsim cov tshuab aspiration
Aspiration systems yog cov tshuab uas tsim los ua kom huv huv. Kev siv cov kev teeb tsa no yog qhov yuav tsum tau ua ntawm txhua lub tuam txhab kev lag luam uas muaj cov teeb meem emissions rau hauv huab cua
Commissioning: lub koom haum, kev siv, kev pab cuam thiab nqi
Txhawm rau pab txhawb kev ua haujlwm ntawm cov neeg ua haujlwm tu kom ntau li ntau tau, txuas ntxiv lub neej ntawm cov cuab yeej, zam kev tso tawm cov khoom tsis raug thiab ua raws li txhua yam kev nyab xeeb, nws yuav tsum tau ua haujlwm ua ntej pib lub tshuab tshiab
Flange txuas yog dab tsi? Hom kev sib txuas flange. Flanged kev sib txuas hauv kev lag luam
Flanged kev sib txuas feem ntau siv hauv kev lag luam. Lawv yuav tsum xyuas kom meej qhov nruj thiab lub zog ntawm cov khoom sib dhos. Lub luag haujlwm ntawm kev sib txuas zoo yog qhov tseem ceeb, vim tias daim ntawv cog lus tsis muaj zog tuaj yeem ua rau poob loj thiab ua rau muaj kev phom sij rau cov neeg ua haujlwm
Chaw nres tsheb kom nce dej siab hauv tsev: nthuav dav, hom, nta, tshuaj xyuas
Zaj lus no mob siab rau cov chaw tso dej kom nce siab hauv tsev. Ntau yam, nta thiab kev tshuaj xyuas ntawm cov chav nyob no suav nrog
Lub tsheb loj. Yuav nrhiav koj qhov chaw li cas?
Ib qho ntawm txoj kev lom zem tshaj plaws rau kev mus los yog kev tsheb ciav hlau. Txhua tus neeg uas tau mus xyuas lub tsheb sib tw yog paub txog lub suab ntawm lub log, tshuaj yej hauv lub khob nrog lub khob tuav thiab tsis muaj kev sib tham nrog cov phooj ywg mus ncig. Txawm li cas los xij, ob peb tus neeg paub txog nws keeb kwm thiab qee qhov nthuav dav. Tsis tas li ntawd, tsis yog txhua tus tuaj yeem pom lawv tus kheej lub rooj zaum hauv lub tsheb uas tsis muaj kev pab los ntawm tus neeg xyuas pib
Types ntawm nkoj: kev faib tawm
Hiav txwv yeej ib txwm nyiam tib neeg. Kev lag luam tau tsim, cov cuab yeej tshiab thiab tshuab tau tshwm sim, thiab tsis ntev ntau lub nkoj thiab nkoj tau tso rau hauv dej. Nyeem txog lawv hom hauv kab lus
Tim nkoj: npe nrog cov duab
Raws li lub nkoj tau tsim, qee hom kev ua rog tau tshwm sim, lwm tus tau ploj mus, thiab lwm tus tseem coj lub ntsiab lus sib txawv. Lub frigate yog ib qho piv txwv. Lub tswv yim no muaj sia nyob tom qab hom xws li ironclads, dreadnoughts thiab txawm tias kev sib ntaus sib tua
Tus qauv ntawm lub nkoj. Hom thiab lub hom phiaj ntawm nkoj
Tus qauv ntawm lub nkoj, yam tsawg kawg yog nws cov txheej txheem tseem ceeb, tsis yog nyob ntawm hom thiab lub hom phiaj ntawm lub nkoj, txawm tias nws yog cov nkoj uas tau tsav los ntawm lub zog ntawm cov cua uas inflates lub sails, los yog wheeled steamers nrog. lub tshuab ua pa ua lub zog ua kom muaj zog, lub nkoj caij nkoj nrog lub tshuab hluav taws xob ua haujlwm, lossis nuclear icebreakers. Tsuas yog cov nkoj caij nkoj kuj muaj qhov sib tw, rigging thiab sails
Kev sib txuas: lub hom phiaj, hom kev sib txuas. Piv txwv, qhov zoo, qhov tsis zoo ntawm hom kev sib txuas
Tshuab thiab tshuab cuab yeej, khoom siv thiab khoom siv hauv tsev - tag nrho cov txheej txheem no muaj ntau cov ntsiab lus hauv lawv cov qauv tsim. Lawv cov kev sib txuas zoo yog qhov lav ntawm kev ntseeg tau thiab kev nyab xeeb thaum ua haujlwm. Hom kev sib txuas twg muaj? Cia peb ua tib zoo saib lawv cov yam ntxwv, qhov zoo thiab qhov tsis zoo
Hom roj av tseem ceeb
Xwm paub peb lub ntsiab: khoom, kua thiab gaseous. Yuav luag txhua cov kua tuaj yeem tau txais txhua qhov ntawm ob qho ntxiv. Ntau cov khib nyiab, thaum yaj thiab evaporated los yog hlawv, tuaj yeem ntxiv cov ntsiab lus ntawm huab cua. Tab sis tsis yog txhua lub roj tuaj yeem dhau los ua ib feem ntawm cov khoom siv los yog kua. Ntau hom gases paub, uas txawv ntawm ib leeg hauv cov khoom, keeb kwm thiab daim ntawv thov nta
Raw khoom yog lub hauv paus ntawm kev tsim khoom
Raw khoom yog cov khoom siv rau kev ua haujlwm ntxiv hauv kev tsim khoom. Qhov tseeb, nws yog nrog nws qhov kev tso tawm ntawm txhua yam khoom pib
Bolt lub zog chav kawm: cim, GOST thiab zawm torque
Kab lus piav qhia txog hom kev sib txuas tseem ceeb ntawm threaded. Tshwj xeeb mloog yog them rau lub tswv yim ntawm bolt lub zog chav kawm
Kev tsim khoom yog kev tso tawm cov khoom
Kev tsim khoom yog koom nrog kev tsim cov khoom lag luam txhawm rau ua kom tau raws li tib neeg kev xav tau. Cov txiaj ntsig yog qhov kawg ntawm kev lag luam
Silk production: yav dhau los thiab tam sim no
Kev tsis sib haum xeeb txog thaum twg cov txheej txheem kev tsim cov ntaub lo lo ntxhuav pib txuas ntxiv mus rau hnub no. Txawm li cas los xij, qhov kev tshawb pom ntawm archaeologists nyob rau hauv Suav teb tuaj yeem xaus rau qhov teeb meem no - cov khoom tawg tau pom hauv xyoo 1958 hauv lub xeev Shandong, nyob rau sab hnub tuaj Suav teb, yog cov khoom qub tshaj plaws uas tau nqis los rau peb hauv ntiaj teb
Paj Rwb: ntaub rau txhua lub sijhawm
Txij thaum ub los txog niaj hnub no, paj rwb yog cov khoom nyiam rau ntau tus neeg. Cov ntaub ua los ntawm cov khoom siv ntuj no yog qhov zoo nkauj heev thiab nyiam hnav
Helicopter qauv: txheej txheem cej luam, specifications, piav qhia thiab tshuaj xyuas
Helicopter qauv: ntsuas, piav qhia, nta. Xov tooj cua-tswj lub nyoob hoom qav taub qauv: ib tug txheej txheem cej luam ntawm qhov zoo tshaj plaws kev hloov kho, duab, tshuaj xyuas. Mi helicopter cov khoom siv qauv: tsis
Slavyanka Confectionery (Stary Oskol): keeb kwm, piav qhia, khoom
Slavyanka confectionery Hoobkas hauv Stary Oskol, Belgorod cheeb tsam, yog ib lub lag luam nrog keeb kwm nplua nuj. Founded hauv lub xyoo pua 18th, nws tau loj hlob los ntawm ib tug me me bakery mus rau lub tuam txhab ua zaub mov loj. Niaj hnub no, ntau lawm yog ib feem ntawm lub koom haum Slavyanka confectionery, uas tau rallied xws reputable manufacturers li Volzhanka, KONFI, lub Hoobkas muaj npe tom qab. Krupskaya thiab lwm tus
Chocolate Hoobkas "Novosibirskaya" - tus yuam sij rau kev vam meej hauv cov khoom zoo
Chocolate Hoobkas "Novosibirskaya" tau pib ua haujlwm nyob rau hauv 1942 nyob deb thiab rau hnub no yog lub chaw tsim khoom tseem ceeb ntawm cov khoom qab zib hauv Siberia. Qhov ntau ntawm nws cov khoom yog loj heev. Qhov zoo yog qhov zoo tshaj plaws. Qhov no yog lossi saib xyuas los ntawm lub Hoobkas tswj. Cov cuab yeej tau hloov kho txhua xyoo, kev tsim kho tshiab thiab thev naus laus zis tau qhia. Peb yuav tham txog yuav ua li cas lub tuam txhab tswj hwm nws txoj haujlwm tseem ceeb hauv kab lus
Demidov factories: piav qhia, keeb kwm, khoom thiab tshuaj xyuas
Demidov cov chaw tsim khoom tau npog hauv qhov tsis pub lwm tus paub, muaj keeb kwm ntev ntawm kev pabcuam rau lub xeev thiab tus kheej tau txais txiaj ntsig. Demidovs yog innovators, industrialists, philanthropists thiab eccentrics. Tsab xov xwm yuav qhia rau koj tias yam dab tsi ntawm cov cuab yeej cuab tam tsev neeg tau tso tseg, nws cov neeg sawv cev tau ua dab tsi rau lub tebchaws, thiab lawv yog thawj tus tsim tag nrho cov kev lag luam, mining, tshawb nrhiav pob zeb hauv av li cas
Txhim khu kev tiv thaiv nta: Lubricating Greases
Tsis muaj txheej txheem ntau lawm yog tsis muaj qee yam khoom. Lubricants yog xws li irreplaceable txuj ci tseem ceeb kho. Lawv siv tsis tau tsuas yog nyob rau hauv ntau lawm, tab sis kuj nyob rau hauv lub neej txhua hnub
Axlebox units: piav qhia, ua haujlwm tsis zoo, tsim thiab kho
Tam sim no, kev sib txuas lus kev tsheb ciav hlau hauv lub tebchaws thiab ntawm cov tebchaws tau tsim kho zoo heev. Qhov tseeb tias cov tsheb ciav hlau nqa cov neeg coob coob lossis cov khoom muaj txiaj ntsig qhia tias lawv yuav tsum nyob rau hauv cov txheej txheem zoo meej kom tsis txhob muaj teeb meem loj. Ib qho tseem ceeb tshaj plaws yog lub thawv qag
Pump NShN-600, yam ntxwv
Thaum tua hluav taws, ntau lub twj tso kua mis yog siv los muab dej hauv nws daim ntawv ntshiab thiab nrog cov khoom ntxiv ntawm tus neeg ua npuas dej. Ib qho ntawm cov khoom siv feem ntau yog NShN-600 twj tso kua mis, uas yog ib feem ntawm cov cuab yeej txheem ntawm yuav luag txhua yam khoom siv tua hluav taws
Diesel locomotive 2TE10M: tsim thiab yam ntxwv
Kev loj hlob tsis tu ncua ntawm kev lag luam hauv USSR hauv 70s ua rau muaj kev nce hauv kev thauj khoom thauj. Cov locomotives muaj nyob rau hauv lub depot fleet tsis tuaj yeem txav cov tsheb ciav hlau loj ntawm kev kub ceev thiab ntawm txoj kev uas muaj qhov nyuaj. Txoj kev loj hlob ntawm diesel locomotives nrog diesel hwj chim los ntawm 4000 rog tsis suav nrog cov kev npaj mus sij hawm ntev ntawm diesel locomotive enterprises, yog li qhov tseem ceeb yog nyob rau hauv lub creation ntawm multi-section locomotives ua los ntawm cov qauv serial qhov chaw
Skicker, cov qauv siv ntau tshaj plaws
Thaum ua haujlwm txiav ntoo, kev xa cov ntoo uas poob los ntawm qhov chaw txiav mus rau qhov chaw thauj khoom rau cov ntoo tsheb thauj khoom yog siv cov skidders. Tam sim no, feem ntau cov cav tov yog cov qauv TT-4 thiab TDT-55
T-34-100: keeb kwm ntawm kev tsim
Lub T-34 nruab nrab tank thaum lub sijhawm nws tshwm sim xyoo 1940 tau ntsib qhov xav tau siab tshaj plaws rau hom riam phom no. Tab sis kev ruaj ntseg loj hlob ntawm cov yeeb ncuab tso tsheb hlau luam yuam kev teeb tsa ntau dua thiab muaj zog dua phom - 85 hli caliber thiab siab dua
UD yog cov ntawv luv rau cov tshuab ua haujlwm ruaj khov
Thaum kawg ntawm 60s, UD-25 lub cav nrog ob lub tog raj kheej tau tshwm sim hauv kev tsim khoom ntawm Ulyanovsk Motor Plant. Kev tu thiab kho raws sijhawm yog tus yuam sij rau kev ua haujlwm ntev ntawm cov motors
Loading cranes: hom thiab cov cai khiav haujlwm
Ntau xyoo dhau los, cov cuab yeej nqa khoom yog ib qho kev ua tiav ntawm kev siv tshuab. Tab sis niaj hnub no, thaum cov thev naus laus zis thiab cov khoom siv niaj hnub tau nthuav tawm, nws maj mam dhau los ua ib txwm muaj
Cov iav kub-tiv taus: tsim cov yam ntxwv thiab kev ua haujlwm
Iav yog ib qho ntawm cov khoom qub tshaj plaws thiab ntau yam. Cov khoom iav muaj nyob ib puag ncig peb, tab sis feem ntau peb tsis xav ntau dhau ntawm nws cov yam ntxwv. Lawv tuaj yeem sib txawv heev nyob ntawm lub hom phiaj ntawm kev siv cov khoom lag luam yav tom ntej. Ib qho ntawm ntau hom yog cov iav kub-resistant. Cia peb kawm seb nws txawv ntawm qhov ib txwm muaj thiab qhov twg nws siv
Pine rosin yog dab tsi?
Pine rosin muaj dab tsi? Nws yog rau dab tsi? Lub xeev tus qauv twg yog lub luag haujlwm rau nws qhov zoo?
Chaw. Kev tsim hluav taws xob: khoom siv
Tam sim no, koj tuaj yeem tau txais txiaj ntsig zoo los ntawm kev teeb tsa koj tus kheej ua lag luam. Thiab nws yog ib qho tsim nyog sau cia tias niaj hnub no xws li ib hom roj ntsha roj li charcoal yog pib txaus siab rau qhov tshwj xeeb. Yog li yog vim li cas ho tsis sim npaj cov khoom ntawm cov khoom no?
Coal: daim ntawv thov thiab ntau haiv neeg
Nws yog ib qho nyuaj rau xav txog tej yam tseem ceeb rau tib neeg ntau dua li cov thee. Nws daim ntawv thov yog li multifunctional uas tej zaum koj cia li xav. Lub sijhawm zoo li no, kev ua xyem xyav involuntarily nkag mus rau hauv, thiab cov lus nug uas muaj tseeb hauv kuv lub taub hau: "Dab tsi? Puas yog tag nrho cov thee?!” Txhua leej txhua tus tau siv los txiav txim siab thee tsuas yog cov khoom siv hluav taws xob, tab sis, qhov tseeb, nws cov kev siv ntau yam yog qhov dav heev uas nws zoo nkaus li zoo kawg nkaus
Rov qab osmosis dej kho cog
Cov kab lus tau mob siab rau rov qab osmosis dej kho cov nroj tsuag. Cov yam ntxwv ntawm cov qauv zoo li no, kev tshuaj xyuas, nqi, thiab lwm yam yog suav tias yog
Electrolytic refining ntawm tooj liab: muaj pes tsawg leeg, qauv thiab cov tshuaj tiv thaiv
Tooj liab feem ntau pom muaj nyob hauv chalcopyrite thiab sulfide ores. Silicate, sulfate thiab carbonate ores kuj muaj tooj liab. Nws qhov feem pua qis hauv cov ores no ua rau nws tsim nyog los mloog lawv ua ntej electrolysis. Cov txheej txheem siv los mloog cov tooj liab muaj xws li cua sov hauv qhov cub lossis ua rau lawv nrog sulfuric acid
Lim cov ntaub ntawv: hom, yam ntxwv, lub hom phiaj
Kev tsim khoom niaj hnub thiab cov neeg siv khoom zoo tib yam yuav tsum tau ua kom huv ntawm ntau yam khoom. Rau qhov no, ntau yam ntaub ntawv lim tau siv. Dab tsi ntawm lawv muaj nyob thiab cov khoom dab tsi lawv yog tus cwj pwm los ntawm, yuav tsum tau txiav txim siab ntau ntxiv
Extruded npuas: specifications, thickness, ceev, thermal conductivity
Kev tsim kho kev lag luam niaj hnub no muaj ntau yam khoom siv rwb thaiv tsev thermal. Lawv txawv nyob rau hauv ntau lawm technology thiab lawv cov khoom. Txawm li cas los xij, ib qho ntawm cov neeg nyiam tshaj plaws yog extruded ua npuas ncauj, uas yuav tau tham hauv qab no
Threaded stud: cov ntsiab lus yooj yim thiab kev siv
Zinc-plated threaded stud yog ib tug hlau pas nrig, raws li tag nrho ntev ntawm ib tug metric xov yog thov los ntawm knurling. Nws mounts nrog rauj-hauv cov thauj tog rau nkoj, metric txiv ntseej thiab ntxhua khaub ncaws, lub tes tsho connector thiab perforated profile nyob rau hauv ntau qhov ntev. Qee zaum nws yog siv los kho lossis zawm lub hauv paus hauv kev teeb tsa ntawm formwork lossis ua lub luag haujlwm ntawm kev ncua
Kev siv cov cuab yeej tsim khoom yog qhov lav ntawm kev ua tiav
Hauv kev lag luam, yuav tsum siv cov cuab yeej siv los tsim cov khoom tshwj xeeb. Tias yog vim li cas tus coefficient ntawm nws siv yog qhov tseem ceeb heev
Daim duab ua haujlwm ntawm automation. Nws yog rau dab tsi?
Nyob rau xyoo tas los no, cov txheej txheem automation hauv kev lag luam tau dhau los ua qhov cuam tshuam zoo kawg. Thiab daim duab ua haujlwm yog ib feem tseem ceeb ntawm cov txheej txheem no
JSC "Yaroslavl Tire Plant": piav qhia, khoom lag luam, ntau lawm thiab tshuaj xyuas
JSC Yaroslavl Tyre Cog yam tsis muaj kev tshaj tawm yog tus thawj coj ntawm lub teb chaws kev lag luam log tsheb. Txhua xyoo, lub tuam txhab tsim tawm txog 3 lab units ntawm cov khoom zoo rau ntau yam khoom siv. Lub tuam txhab yog ib feem ntawm tuav "Cordiant"
Paraffin tswm ciab: kev tsim tshuab
Paraffin tswm ciab tuaj yeem tsim siv ob lub thev naus laus zis tseem ceeb. Hauv kev tsim cov khoom lag luam zoo ib yam, cov txheej txheem casting feem ntau yog siv. Ntau dua thiab zoo nkauj tswm ciab yog tsim los ntawm dipping lub workpiece nyob rau hauv molten paraffin
ATGM - riam phom los rhuav tshem cov tank. ATGM "Kornet": specifications
Ib lub foob pob hluav taws tiv thaiv lub tank (ATGM) yog riam phom uas tsim los rau kev tawm tsam cov yeeb ncuab armored tsheb. Nws tseem tuaj yeem siv los rhuav tshem cov ntsiab lus fortified, tua ntawm lub hom phiaj ya qis thiab rau lwm yam dej num
ZRK S-125 "Neva": kev txhim kho, kev ua tau zoo, kev hloov kho
S-125 "Neva" - luv-ntau yam tiv thaiv lub dav hlau missile system tsim nyob rau hauv USSR. Kab lus no yuav xav txog keeb kwm ntawm nws cov creation thiab cov yam ntxwv tseem ceeb ntawm kev ua haujlwm
"Qhia cua daj cua dub" ( foob pob hluav taws). Anti-tank missile system
"Whirlwind" - lub foob pob hluav taws xob laser los ntawm Lavxias teb sab foob pob hluav taws tiv thaiv tank (ATGM) 9K121 "Whirlwind" (raws li kev faib tawm NATO - AT-16 Scallion). Nws yog launched los ntawm ships, raws li zoo raws li los ntawm Ka-50, Ka-52 helicopters thiab Su-25 nres aircraft. Nws tau tshwm sim thawj zaug hauv xyoo 1992 ntawm Farnborough Air Show
Corvette "Resistant" project 20380
Project 20380 corvette Stoikiy yog lub nkoj tshiab ntawm Lavxias Navy (tus naj npawb 545) tsim hauv kev txhim kho ntawm Thundering corvette class. Nws tau tsim nyob rau hauv Almaz Central Design Bureau, ua nyob rau hauv 2006-2012, thiab nyob rau hauv lub caij ntuj sov ntawm 2014 los ua ib feem ntawm Lavxias teb sab Navy
Yam ntxwv ntawm Su-35. Su-35 aircraft: specifications, daim duab ntawm lub fighter. Cov yam ntxwv sib piv ntawm Su-35 thiab F-22
Nyob rau xyoo 2003, Sukhoi Design Bureau pib qhov thib ob nyob rau hauv kab modernization ntawm Su-27 fighter los tsim lub Su-35 aircraft. Cov yam ntxwv ua tiav hauv cov txheej txheem ntawm kev hloov kho tshiab ua rau nws tuaj yeem hu nws ua 4 ++ tiam neeg sib ntaus sib tua, uas txhais tau hais tias nws lub peev xwm ze li sai tau rau PAK FA thib tsib tiam dav hlau
Depleted uranium: piav qhia, yam ntxwv thiab daim ntawv thov
Depleted yog hu ua uranium, muaj feem ntau ntawm isotope U-238. Nws tau tsim thawj zaug hauv xyoo 1940 hauv Tebchaws Meskas. Cov khoom siv no yog cov khoom siv los ntawm kev txhawb nqa ntawm ntuj uranium hauv kev tsim cov roj nuclear thiab mos txwv
Nqaij: ua. Cov khoom siv rau kev ua cov nqaij thiab nqaij qaib. Kev tsim khoom, khaws cia thiab ua cov nqaij
Cov ntaub ntawv ntawm lub xeev cov txheeb cais qhia tau hais tias qhov ntim ntawm cov nqaij, mis nyuj thiab nqaij qaib noj los ntawm cov pejxeem tau poob qis hauv xyoo tas los no. Qhov no yog tshwm sim tsis tau tsuas yog los ntawm tus nqi txoj cai ntawm manufacturers, tab sis kuj los ntawm banal tsis txaus ntawm cov khoom, qhov yuav tsum tau ntim ntawm uas tsuas yog tsis muaj sij hawm los tsim. Tab sis nqaij, kev ua haujlwm uas yog kev lag luam muaj txiaj ntsig zoo, tseem ceeb heev rau tib neeg kev noj qab haus huv
Mayonnaise ntau lawm: khoom siv thiab thev naus laus zis
Mayonnaise yog ib qho txias emulsion siv los ua kua ntses los yog khoom qab zib. Nws yog tsim los ntawm kev sib tov qe yolks thiab butter, ces flavored nrog ntau yam ua ke ntawm vinegar, mustard, tshuaj ntsuab thiab txuj lom. Mayonnaise feem ntau yog siv los ua lub hauv paus rau creamy nyias hnav khaub ncaws
Tau txais cawv: txoj hauv kev thiab cov khoom siv raw
Tau txais cawv yog txheej txheem thev naus laus zis nyuaj. Muaj cov txheej txheem biochemical thiab tshuaj lom neeg kom tau txais cawv. Tau txais methyl cawv yog ua los ntawm kev siv ntau yam technologies
Orthophosphoric acid: siv thiab kev nyab xeeb
Orthophosphoric acid tau ua haujlwm ntev rau txiv neej ncaj ncees. Lub Scope ntawm nws siv yog heev dav: nyob rau hauv ci, confectionery, ua liaj ua teb. Tab sis tsis tsuas yog qhov no yog nto moo rau phosphoric acid. Nws siv tiv thaiv xeb tau dhau los ua ib lo lus. Ib qho zoo tshaj plaws los tiv thaiv corrosion
Lub tuam txhab "Derevenskoye Molochko": tshuaj xyuas
"Lub Zos Mis" - lub hom phiaj ntawm cheeb tsam Tomsk. Lub tuam txhab no, ib qho ntawm ob peb, tau pib tsim Italian mozzarella thiab ricotta cheeses ntawm Lavxias teb sab lag luam. Los ntawm kev cia siab rau kev tsim kho tshiab thiab kev ua tau zoo, lub tuam txhab yeej kev khuv leej ntawm cov neeg siv khoom
Ka-52 "Alligator" - kev txawj ntse txhawb nqa nyoob hoom qav taub
"Alligator" yog lub nyoob hoom qav taub nrog cov cuab yeej siv siab tshaj plaws ntawm lub nkoj thiab cov cuab yeej siv riam phom zoo tshaj plaws niaj hnub no. Tsis tas li ntawd, lub tsheb sib ntaus sib tua no, uas tsis muaj analogues hauv ntiaj teb, muaj ntau lub davhlau tshwj xeeb thiab cov yam ntxwv thiab kev muaj peev xwm. "Alligator" - lub nyoob hoom qav taub raug lees paub los ntawm Guinness Phau Ntawv Cov Ntaub Ntawv ua lub tsheb sib ntaus zoo tshaj plaws hauv ntiaj teb hauv nws chav kawm
Black Shark Helicopter: Steel Hawk Tuag Grip
Lub Dub Shark nyoob hoom qav taub yog lub ntiaj teb qhov zoo tshaj plaws kev tawm tsam-ua phem ib leeg-lub rooj rotorcraft rau nruab hnub siv, tsim los ntawm Kamov Experimental Design Bureau hauv 1982. Nyob rau hauv cov nqe lus ntawm kev zoo tag nrho ntawm nws cov kev sib ntaus sib tua systems, nws ho surpasses qhov zoo tshaj plaws txawv teb chaws qauv. Lub nyoob hoom qav taub "Black Shark" muaj qhov hnyav ntawm lub davhlau ntawm 10.8 tons, muaj peev xwm ceev txog 390 km / h, tus nqi nce - 10 m / s, qhov siab tshaj plaws - 5500 m
Ste alth technology. Lub dav hlau F-117A, C-37 "Berkut" thiab lwm yam
Russia tau ntev tau vying nrog Tebchaws Meskas rau qhov tseem ceeb hauv kev tsim lub nees nkaum-thawj xyoo fighter uas sib txuas cov yam ntxwv ntawm lub tsheb supersonic super-maneuverable combat tsheb thiab ste alth technology. Ib lub dav hlau uas muaj cov khoom zoo li no yuav tsum tsis txhob raug ntes los ntawm radars thiab cov cuab yeej saib xyuas infrared
Flange plugs: Scope thiab tsim nta
Flange plugs yog cov qauv tsim tsim los npog txhua yam ntawm qhov kawg qhib ntawm cov kav dej thiab txoj kev loj
Ferrous sulfate: lub cev thiab tshuaj lom neeg, kev tsim khoom, kev siv
Ferrous sulfate yog cov tshuaj lom neeg uas muaj ntau yam hauv cov xwm txheej thiab siv dav hauv ntau yam haujlwm ntawm kev lag luam. Muaj qhov sib txawv thiab trivalent hloov kho ntawm cov khoom no. Thawj ntau yam, tseem hu ua ferrous sulfate, yog ib qho inorganic binary non-volatile compound muaj cov mis FeSO4
Nyob riam - rau tsov rog lossis rau chav ua noj
Nyob hauv kab lus no koj yuav kawm txog ntau hom riam, nkag siab tias hom hlau twg siv los ua lawv. Koj tseem yuav tau muab cov ntaub ntawv hais txog hom riam phom
"Lever-AB". Cov tshuab hluav taws xob ua tsov rog tshiab kawg
Cov cuab yeej siv tub rog niaj hnub tsis tuaj yeem xav txog yam tsis muaj cov khoom siv hluav taws xob ntau. Nws tsis yog qhov xav tsis thoob tias lawv qhov kev puas tsuaj cuam tshuam rau kev ua haujlwm tsis zoo ntawm riam phom. Yog li cov khoom siv hluav taws xob ua tsov rog tshiab kawg, xws li AB Lever, yog qhov tseem ceeb tshaj plaws ntawm cov tub rog niaj hnub no
Su-47 "Berkut": duab, specifications. Vim li cas qhov project raug kaw?
Aircraft manufacturing, tshwj xeeb tshaj yog nyob rau hauv cov tub rog sphere, peb yeej ib txwm them tshwj xeeb mloog mus rau - qhov ntev ntawm ciam teb yog loj, thiab yog li ntawd tsis muaj txoj kev uas tsis muaj aviation combat. Txawm tias nyob rau xyoo 1990, qhov chaw no tau tswj kom muaj sia nyob. Tej zaum ib tug neeg nco txog qhov muaj yeej ntawm S-37, uas tom qab ntawd hloov mus rau Su-47 Berkut. Cov nyhuv ntawm nws cov tsos yog qhov zoo kawg nkaus, thiab cov thev naus laus zis tshiab tau ua rau muaj kev txaus siab tsis txaus ntseeg tsis yog hauv peb lub tebchaws, tab sis kuj txawv teb chaws. Vim li cas qhov no tshwm
Project 1144 heavy nuclear missile cruiser "Kirov" (duab)
Lub tswv yim ntawm kev tsim cov nkoj loj hauv dej hiav txwv, lub luag haujlwm uas yuav siv los ntawm lub tshuab hluav taws xob nuclear, tau nrhiav cov kws tshawb fawb thiab cov kws tsim qauv yuav luag txij li lub sijhawm thawj qhov kev sim hauv thaj tsam ntawm atom splitting tshwm sim
T-72B3 - tsiaj dab tsi? Specifications
Nyob rau xyoo tas los no, muaj ntau cov lus xaiv hais txog kev hloov kho tshiab ntawm T-72 MBT, qee qhov ntawm lawv tau hais ncaj ncees, thiab lwm qhov nws yuav luag rau kev tsim txom tawm. Thiab thaum kawg ntawm xyoo 2013 nws tau txiav txim siab tsis kam yuav T-72B3 rau cov kev xav tau ntawm cov tub rog, cov lus no tau cuam tshuam los ntawm cov foob pob tawg
Cog kev kho dej khib nyiab. Cov neeg lim dej lim dej
Cov dej khib nyiab yog ib qho mob ntawm lub ntiaj teb niaj hnub no. Peb tsim cov dej phwj tuaj ntau heev uas thaum tsis muaj kev kho mob, ib nrab ntawm lub ntiaj teb yuav muaj txhua txoj hauv kev los hloov mus rau hauv cov kav dej tiag tiag
Yuav ua li cas yog Rostov NPP (Volgodonsk) tsim? Tus naj npawb ntawm lub zog units thiab hnub ua haujlwm
Cheeb tsam Rostov yog qhov chaw ntawm Rostov nuclear fais fab nroj tsuag (Volgodonskaya yog thawj lub npe). Nws sawv 12 km ntawm lub nroog Volgodonsk, ze ntawm Tsimlyansk reservoir. Thawj chav tsev hluav taws xob xa tawm txog 1 GWh ntawm hluav taws xob mus rau daim phiaj. Lub community launch ntawm lub hwj chim tom ntej no tau tshwm sim nyob rau hauv 2010. Tam sim no nws yog maj mam ncav cuag qhov kev npaj ua hauj lwm
India, Kudankulam (NPP): piav qhia, keeb kwm thiab nta
Lub Kudankulam Nuclear Fais Fab Lub Tuam Txhab hauv Is Nrias teb, uas tau mus ua lag luam ntawm nws thawj lub zog hluav taws xob thaum Lub Kaum Ob Hlis 31, 2013, tau tsim thiab tsim kho rau 26 xyoo thiab tau tiv thaiv xya lub hlis thaiv los ntawm cov neeg tawm tsam los ua qhov loj tshaj plaws nuclear fais fab nroj tsuag nyob rau hauv lub teb chaws
Kev tswj hwm lub tshuab ua haujlwm: qib, cuab yeej, nta thiab kev siv
Automation ntawm kev tswj hwm, lossis ACS luv luv, yog cov khoom siv uas tso cai rau koj ua haujlwm tau zoo thiab ib nrab tsis siv neeg lossis tag nrho cia li saib xyuas cov txheej txheem kev ua tiav. Lawv feem ntau siv dav hauv kev lag luam
Lub tebchaws twg yog TNCs loj tshaj plaws hauv ntiaj teb?
Kev lag luam pib thaum ub. Nrog rau txoj kev loj hlob ntawm noob neej, xyaum tsis muaj dab tsi hloov, tsuas yog, ntawm chav kawm, kev ua lag luam rau cov khoom thiab cov kev pab cuam nws tus kheej. Yog hais tias ua ntej lawm ntau lawm raws li ib tug tej thaj chaw deb, tam sim no yuav av los ntawm lwm lub teb chaws rau kev tsim kho ntawm lawv tus kheej cov nroj tsuag thiab factories yog heev ib tug zoo tshwm sim. Qhov no tau ua tiav (thiab nquag nquag) tsis yog los ntawm European lub teb chaws, tab sis kuj los ntawm Lavxias Federation. Qhov tseeb, txog lub teb chaws twg TNCs loj tshaj plaws hauv ntiaj teb yuav tau tham
Kronstadt Marine Plant - nrog kev ntseeg siab rau yav tom ntej
Kronstadt Marine Plant ntawm Lavxias Lub Tsev Haujlwm Saib Xyuas Kev Tiv Thaiv yog lub chaw kho nkoj loj tshaj plaws hauv thaj av North-West ntawm Lavxias Federation. Ntawm cov haujlwm tseem ceeb yog kev saib xyuas nkoj, kho cov roj turbines, diesel xyaw, kev ua haujlwm hlau, kev tiv thaiv kev tiv thaiv kev tiv thaiv ntawm cov qauv hlau
Kev xa hluav taws xob los ntawm lub tshuab hluav taws xob mus rau cov neeg siv khoom
Los ntawm qhov chaw ncaj qha ntawm tiam mus rau cov neeg siv khoom, hluav taws xob hluav taws xob dhau los ntawm ntau cov ntsiab lus thev naus laus zis. Nyob rau tib lub sijhawm, cov neeg nqa khoom lawv tus kheej, raws li kev thauj mus los, yog qhov tseem ceeb hauv cov txheej txheem no. Raws li qhov tshwm sim, ntau theem thiab kev sib txuas hluav taws xob sib txuas tau tsim, uas cov neeg siv khoom yog qhov kawg txuas
Av pawg: hom thiab yam ntxwv
Av yog ib txoj hauv kev ntawm cov organic thiab inorganic teeb meem uas ncaj qha thiab ncaj qha txhawb cov nroj tsuag thiab tsiaj lub neej. Muaj cov zaub mov, cov as-ham, dej, cov kab mob thiab cov kab mob uas muaj sia nyob uas muab cov khoom tsim nyog los txhawb kev loj hlob. Cov av ntawm thaj chaw sib txawv txawv ntawm cov tshuaj muaj pes tsawg leeg, qauv, pH nqi, kev ntxhib los mos thiab xim. Av yog lub hauv paus ntawm ib qho ecosystem
Belgorod Abrasive Cog: nws nyob qhov twg thiab nws tsim dab tsi
Cheeb tsam Belgorod muaj npe nrov tsis yog rau nws txoj kev tsim kho hauv nroog, tab sis kuj rau nws txoj kev lag luam muaj zog. Ib qho ntawm cov tuam txhab tom qab-Soviet uas tuaj yeem hloov mus rau kev ua lag luam tshiab yog Belgorod Abrasive Plant. Peb yuav qhia txog nws qhov chaw thiab cov khoom hauv peb cov khoom siv tshiab
Asph alt ntau lawm: thev naus laus zis. asph alt pob zeb cog
Kev tsim khoom loj ntawm asph alt nyob rau thaj tsam ntawm Lavxias Federation tau ua txij li xyoo 2013. Xyoo no, nws tau txiav txim siab los tsim ntau txoj haujlwm tseemfwv, uas suav nrog kev tso txoj kev tshiab, thiab cov kho cov kev loj qub
Pharmacy - yog dab tsi?
Pharmaceuticals yog ib qho kev lag luam uas nws txoj haujlwm yog los tsim cov tshuaj raws li cov qauv. Nws yog keeb kwm txuas ntxiv ntawm chaw muag tshuaj. Muaj qhov sib txawv tseem ceeb ntawm ob lub tswv yim thiab txoj hauv kev tau txais cov tshuaj
Electroplating. Kev siv tshuab electroplating. Electroplating
Electroplating yog ib txoj hauv kev ntawm txheej ib lub hlau nrog lwm tus los ntawm kev siv electrolysis. Cov txheej txheem no yog ua los ntawm kev siv cov txheej txheem immersion ib txwm
Kev tsim tshuaj hauv tebchaws Russia
Tam sim no nrog rau kev tsim tshuaj yeeb hauv lub tebchaws. Kev tsom xam ntawm kev loj hlob ntawm kev lag luam hauv tsev. Yuav ua li cas raw cov ntaub ntawv rau tshuaj. Cov yam ntxwv ntawm kev tsim cov txheej txheem ntawm cov khoom tshiab, nrog rau cov lus piav qhia ntawm peb theem ua tiav ua ntej kev tsim khoom lag luam. Dab tsi yog tshuaj yeeb tshuaj. Lub ntsiab hom tshuaj ntau lawm. Cov teeb meem tiag tiag ntawm Lavxias teb sab kev lag luam tshuaj thiab tshuaj
Txhim kho cov hlau: kev xav thiab kev xyaum
Hlau etching tso cai rau koj rov tsim dua txhua zaj lus, ntawv nyeem, qhov tob lossis embossed ornament ntawm yuav luag txhua qhov hlau. Cov khoom tau txais txiaj ntsig tiag tiag rau kev mob siab rau qee lub sijhawm dawb los kawm cov thev naus laus zis no
"Boeing-707" - tus neeg caij dav hlau: tshuaj xyuas, piav qhia, yam ntxwv, keeb kwm ntawm kev tsim thiab kev teeb tsa hauv tsev
Hnub no, Boeing Corporation yog ib qho kev lag luam hauv Asmeskas kev lag luam aviation thiab yog ib lub ntiaj teb ua lag luam dav hlau. Nyob rau tib lub sijhawm, nws yog lub tuam txhab no uas tau tsim lub dav hlau Boeing 707, ua tsaug rau qhov kev mus ncig thoob ntiaj teb huab cua tau txais txiaj ntsig dav