2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28
Thawj zaug, cov ntawv lim tau pib siv nyob rau hauv Suav teb thaum ub, tau kawg, cov khoom siv zoo tib yam tau siv rau lub hom phiaj no, tab sis lub hauv paus ntsiab lus tau muab tso rau. Tam sim no, nws tsuas yog tsim nyob rau hauv ob peb lub tuam txhab tshwj xeeb. Qhov no yog vim qhov tseeb tias cov ntawv lim, txawm tias nws qhov yooj yim pom tseeb, yog cov khoom siv rau kev tsim khoom uas muaj ntau yam kev siv thev naus laus zis. Ntxiv rau lub hauv paus cellulose nws tus kheej, nws muaj cov fibers tshwj xeeb thiab tshuaj, dyes, polymers.
Daim ntawv lim yog siv los ntxuav cov roj, roj thiab cua ntws hauv lub tsheb cav, lub zog hluav taws xob thiab cov tshuab ua liaj ua teb. Nws yog siv rau kev pom nyob rau hauv cov roj turbines, industrial compressors, diesel xyaw ntawm railway tsheb. Tsis tas li ntawd, cov ntawv lim dej yog siv rau kev soj ntsuam hauv kev lag luam khoom noj (qab zib, npias thiab cawv), nrog rau ntau yam kev lag luam.
Qhov dav ntawm daim ntawv thov ntawm cov khoom yog muab los ntawm qhov tshwj xeebcov khoom ntawm txhua yam ntawm nws hom, tsim tshwj xeeb rau ib lub hom phiaj tshwj xeeb. Cov ntsuas yog nyob ntawm qhov pib cov khoom thiab cov xwm txheej rau kev siv ntxiv. Yog li, txoj haujlwm ntawm cov kws tshaj lij thev naus laus zis lub luag haujlwm rau kev tsim cov khoom siv no yog los xyuas kom meej tias cov ntawv lim ua tau raws li lub cev, cov khoom siv thiab tshuaj lom neeg cov yam ntxwv ntawm qhov kev nruj heev uas nws yuav siv.
Cov txheej txheem ntawm nws qhov chaw tsim khoom yog txhawm rau muab nws cov qauv ntxeem tau, uas yuav ua kom muaj kev sib sib zog nqus ntawm cov khoom txawv teb chaws los ntawm cov roj lim thiab cov kua dej. Nyob rau hauv rooj plaub no, cov ntawv lim yuav tsum muaj qee yam zog, uas feem ntau muab nws ib qho kev faib tawm ntawm fibers hauv cov khoom thiab sib sib zog nqus impregnation ntawm lub hauv paus nrog polymer binder compositions. Lub tshuab ntawm nws cov khoom tsim muaj peb theem tseem ceeb: synthesis ntawm cov fibers muaj pes tsawg leeg, kev npaj ntawm lub hauv paus, impregnation ntawm daim ntawv puag nrog ib tug binder polymer.
Ntau yam khoom siv tuaj yeem siv rau kev ua haujlwm thib peb. Muaj tseeb, styrene-acrylic copolymer (acrylic impregnation), phenol-formaldehyde resins (phenolic) feem ntau yog siv hauv kev lag luam niaj hnub no. Cov qub muaj ntau qhov zoo. Tshwj xeeb, hauv kev tsim cov ntawv nrog acrylic impregnation, tsis tas yuav tsum muaj kev ua haujlwm thev naus laus zis ntxiv - kev kho cua sov, cov ntxaij lim dej no kuj suav tias yog ib puag ncig tus phooj ywg, uas yog qhov tseem ceeb tshwj xeeb tshaj yog thaum ua huab cua. Phenolic impregnation yog ib txoj hauv kev tsim cov khoom siv rau tshebkev lag luam. Nyob rau hauv rooj plaub no, ob hom resins (novolac los yog resol) los yog sib tov ntawm no tuaj yeem siv. Lub ntsiab kom zoo dua ntawm novolac piv rau resole yog cov ntsiab lus qis ntawm phenol dawb.
Hauv cov lim dej, ntawv tuaj yeem ntsia tau tom qab embossing, nrog rau ntau txheej, uas tuaj yeem ua tau ntau yam. Qhov no ua rau kom qhov chaw ua haujlwm, lub zog, ntau yam ntawm cov khoom ntes.
Pom zoo:
Kev ntsuas kev nqis peev zoo ntawm kev lag luam: cov ntsiab lus yooj yim, txoj hauv kev, cov hauv paus ntsiab lus, txoj hauv kev txhim kho
Kev nqis peev tsim khoom yog lub hauv paus ntawm txhua lub lag luam. Kev nqis peev loj loj yuav tso cai rau kev tsim lossis hloov kho cov khoom siv thiab cov txheej txheem uas twb muaj lawm, hloov lub cev lossis kev coj ncaj ncees los ntawm cov cuab yeej cuab tam, nce ntim ntawm cov dej num, mastering cov khoom tshiab, nthuav kev muag khoom, thiab lwm yam
Yam yuav muag hauv khw hauv online: tswv yim. Dab tsi yog qhov zoo dua los muag hauv khw hauv online hauv lub nroog me? Dab tsi yog txiaj ntsig los muag hauv khw hauv online thaum muaj kev kub ntxhov?
Los ntawm kab lus no koj yuav pom tias cov khoom twg koj tuaj yeem ua tau nyiaj muag hauv Is Taws Nem. Hauv nws koj yuav pom cov tswv yim tsim lub khw hauv online hauv lub nroog me thiab nkag siab tias koj tuaj yeem khwv tau nyiaj li cas thaum muaj kev kub ntxhov. Tsis tas li ntawd nyob rau hauv tsab xov xwm muaj cov tswv yim los tsim ib lub khw hauv online yam tsis muaj kev nqis peev
Tus nqi se tsawg kawg nkaus raws li kev sau se yooj yim (kev ua se yooj yim)
Txhua tus neeg pib ua lag luam uas tau xaiv cov txheej txheem sau se yooj yim tau ntsib nrog lub tswv yim xws li se tsawg kawg nkaus. Thiab tsis yog txhua tus paub dab tsi nyob tom qab nws. Yog li ntawd, tam sim no lub ntsiab lus no yuav raug txiav txim siab nthuav dav, thiab yuav muaj cov lus teb rau txhua nqe lus nug uas cuam tshuam txog kev lag luam
Yuav hloov tus lej xov tooj li cas hauv Sberbank: txoj hauv kev yooj yim thiab yooj yim, cov txheej txheem thiab cov lus qhia kws tshaj lij
Million of Russians siv cov kev pabcuam ntawm Sberbank. Ntau tshaj 2/3 ntawm cov neeg siv khoom nyiam cov ntawv thov mobile: "Mobile Bank" thiab "Sberbank Online". Txhawm rau ua lag luam, nws txaus kom muaj daim npav Sberbank thiab siv lub smartphone. Tus neeg siv khoom lees paub tag nrho cov haujlwm nrog cov lej los ntawm SMS los ntawm lub txhab nyiaj, yog li ntawd, txhawm rau zam qhov xwm txheej tsis tau pom dua, koj yuav tsum paub yuav ua li cas hloov tus lej xov tooj hauv Sberbank
Kuv puas xav tau daim ntawv teev nyiaj ntsuab rau cov neeg ua lag luam nrog cov txheej txheem se yooj yim? Yuav ua li cas rau npe thiab siv daim ntawv sau nyiaj ntsuab rau cov neeg ua lag luam nyob rau hauv cov txheej txheem se yooj yim?
Kab lus piav qhia txog cov kev xaiv rau kev ua cov nyiaj tsis muaj kev koom nrog cov ntawv sau nyiaj ntsuab (CCT)
