Anticorrosive agents rau kev kho mob hauv qab ntawm lub tsheb

Txhawm rau ua kom lub cev muaj zog thiab cov khoom siv rau corrosion, manufacturers kho cov hlau nrog ib txheej ntawm zinc. Mechanical puas, ya raws, av, acids thiab ntsev rhuav tshem lub Hoobkas kev kho mob ib xyoos tom qab pib lub tsheb ua haujlwm. Qhov feem ntau raug rau corrosion yog zais hollow lub cev kab noj hniav, hauv qab, thresholds thiab tack ntsiab lus.

Raws li kev tiv thaiv ntxiv, sealing mastics thiab anti-corrosion compounds yog siv, uas, nyob ntawm seb qhov chaw ua, muaj hom thiab chav kawm. Xav txog seb tus neeg saib xyuas anticorrosive rau hauv qab ntawm lub tsheb zoo dua, nrog rau cov khoom ntawm txhua qhov muaj pes tsawg leeg thiab nws qhov zoo.

Qhov zoo thiab qhov tsis zoo ntawm cov cuab yeej

Nyob ntawm seb qhov twg ntawm lub cev xav tau kev tiv thaiv ntxiv, kev kho yog xaiv. Cov tshuaj tiv thaiv tus kheej yog siv rau kev ua haujlwm sab hauv thiab tiv thaiv lub cev kab noj hniav. Lubricating putties yog tsim rau sab nrauv kho kom zoo nkauj, cov khoom tiv thaiv kev loj hlob ntawm corrosion thiab ua hauj lwm raws li ib tug ntxiv soundproofing ntawm lub cabin. Qhov zoo ntawm cov tshuaj tiv thaiv corrosion, tsis hais qhov kev txiav txim ntawm daim ntawv thov:

1. Extending lub neej ntawm lub cev hlau.
2. Painting ntawm cov chaw tiv thaiv corrosion thiab tsim kev tiv thaiv ntxiv hauv qab los ntawm sab nraud.
3. Muaj peev xwm ua haujlwm ntawm nws tus kheej.

Qhov tsis zoo ntawm kev tiv thaiv theem nrab muaj xws li:

1. Cov nyhuv me me nrog kev siv tsis raug thiab xaiv cov khoom siv.
2. Lub npog ntsej muag yuav tsum tau hloov tsis tu ncua.
3. Yog hais tias muaj cov hnab ris ntawm xeb ntawm cov hlau, ces koj yuav tsum tau ua noj lub cev, anticorrosive yuav tsis muaj txiaj ntsig.
4. Qhov nyuaj ntawm kev thov tus kheej, nws yog ib qho tsim nyog yuav tsum tau siv cov txheej txheem tsim khoom yog tias koj xav kho tag nrho cov qis ntawm lub tsheb nrog kev tiv thaiv corrosion.

Automotive anticorrosive rau ntau qhov chaw

Industrial thiab proprietary anti-corrosion tebchaw yog tsim los ntawm polymers. Cov kev xav tau nyiaj txiag kuj txawv. Cov txheej txheem ntawm lub cev yog kho nrog putty rau hauv qab, thiab sab hauv yog kho nyob rau hauv 90% ntawm cov neeg mob nrog anti-corrosion paraffin, uas yog siv los ntawm txhuam los yog tshuaj tsuag.

Anticorrosive agents rau kev kho mob ntawm sab hauv

Sab hauv ntawm lub cev muaj xws li: sab hauv ntawm lub hauv qab, stringers, qhov rooj, qhov rooj ncej. Cov hlau yog 90% muab zais los ntawm cov khoom sab nraud los ntawm kev ntsib cov panels, tab sis raug rau cov dej noo, tsis tshua muaj ntsev. Anti-corrosion agents rau kev kho mob ntawm qhov chaw sab hauv hauv qab ua tau raws li cov hauv qab no:

1. Tsis txhoj puab heev rau cov xim tsheb, tsis corrode xim, roj hmab, yas.
2. Lawv muaj siab elasticity. Cov muaj pes tsawg leeg yuav tsum tau sau cov chips thiab tawg.
3. Lawv muab cov xim tiv thaiv los ntawm electrolyte thiab noo noo.
4. Lawv nres cov txheej txheem corrosion, tag nrho khaws cia lub chaw oxide.

Nws tsis pom zoo kom siv cov khoom rau qhov chaw pom tseeb ntawm oxidation yam tsis tau ua ntej ntxuav lub cev. Cov yeeb yaj kiab tshuaj yuav tiv thaiv cov hlau rau lub sijhawm luv luv, txog li 3-5 lub hlis, thiab cov txheej txheem ntawm kev puas tsuaj ntawm lub cev yuav txuas ntxiv mus.

Cov ntaub ntawv tiv thaiv yog tsim los ntawm paraffin lossis hluavtaws roj. Cov muaj pes tsawg leeg ntawm cov roj sai sai nkag mus rau hauv cov kab nrib pleb thiab kab noj hniav thiab npog cov hlau nrog cov yeeb yaj kiab tiv thaiv. Cov neeg tsim khoom tsim cov khoom lag luam hauv cov kaus poom aerosol lossis ua kua, uas yuav tsum tau siv rau saum npoo ntawm ob peb txheej.

Paraffin-based anticorrosive tus neeg sawv cev yog siv los ntawm txhuam los yog tshuaj tsuag. Cov cuab yeej muaj tus qauv tuab vim cov ntawv sau ua ke ntawm cov ciab, ua cov yeeb yaj kiab tiv thaiv ntawm cov hlau saum npoo hlau, uas yuav tsum tau muab tshem tawm thaum ua. Ib qho ntawm qhov tsis zoo ntawm cov khoom siv paraffin yog qhov ua tau ntawm huab cua nkag thaum ua haujlwm nyuaj, yog li corrosion yuav txuas ntxiv mus.

Anticorrosive txheej rau sab nrauv

Sab nrauv ntawm lub cev - hauv qab ntawm lub tsheb, sills, log arches yuav tsum tau kho nrog cov tshuaj tiv thaiv corrosion, uas muaj xws li bituminous mastics thiab chemical compounds uas ua rau kom qeeb ntawm xeb. Yuav tsum muaj cov tshuaj tiv thaiv corrosion rau kev kho sab nraud:

1. Cov khoom tsis kam rau electrolytes, mechanical puas, acids thiab ntsev.
2. Moisture kuj.
3. Siab adhesion rau qhov chaw puas ntawm lub cev.
4. Ib nrab elastic, lub putty tom qab ziab yuav tsum muaj cov qauv zoo ib yam, thaum npog thaj tsam nrog cov yeeb yaj kiab ruaj khov uas tiv taus lub cev deformation.

Ntau cov tshuaj tiv thaiv yog suav tias yog universal thiab tau pom zoo los ntawm cov tuam txhab tsim khoom rau kev tiv thaiv sab hauv thiab sab nraud daim ntawv thov rau cov panels raug.

Auto mechanics qhia txog kev kho txhua lub cev nrog cov cuab yeej cais tsim nyog rau kev ua haujlwm tshwj xeeb. Rau kev kho kom zoo nkauj sab hauv - roj thiab paraffin-raws li tshuaj tsuag, hauv qab thiab qhov pib raug kho nrog bituminous mastic, kua yas.

Cov txheej txheem xaiv thiab cov kev xav tau

Ntau tus neeg tsav tsheb, xaiv ib qho qauv siv nyiaj txiag, ua kom muaj kev tiv thaiv corrosion ntawm lub cev hauv thawj ob peb lub hlis. Qhov no yog qhov tsim nyog thaum yuav Suav tsheb, qee cov qauv ntawm Renault, Chevrolet, thiab lwm yam.

Saib ntxiv: Secrets of the masters: yuav ua li cas xaiv thiab siv los tiv thaiv lub ntiajteb txawj nqus

Cov lus pom zoo thaum xaiv:

1. Nws yog qhov zoo dua los siv cov khoom ua kua nrog rab phom, xaiv homogeneous elastic compositions.
2. Cov khoom siv roj tsis ua kom qhuav kho cov kab noj hniav hauv lub cev.
3. Kev siv cov tshuaj paraffin los tiv thaiv corrosion yuav tiv thaiv kom tsis txhob ya raws thiab ua kom cov oxidation ntawm lub cev uas tsis tau txais kev lag luam galvanization.
4. Kev ua haujlwm sab nraud ntawm hauv qab yog tsim nrog bituminous mastic, PVC roj hmab, kua yas. Homogeneous compositions raug xaiv. Lub tshuab yuav tsum tau mounted rau ib tug nqa.
5. Tag nrho cov khoom muaj qhov txwv lub neej txee.
6. Qhov nruab nrab suav ntawm cov khoom siv rau sab nrauv ntawm hauv qab: 1 liter ntawm anticorrosive ib 1 sq.m ntawm qhov chaw.

Ua ntej xaiv txoj kev tiv thaiv kev tiv thaiv corrosion, nws yog ib qho tsim nyog yuav tsum tau kuaj xyuas qhov xwm txheej ntawm cov hlau thiab, yog tias tsim nyog, ua haujlwm kho.

Kev ntsuam xyuas ntawm cov tshuaj tiv thaiv zoo tshaj plaws

Ntawm cov kev xaiv loj ntawm kev ua lag luam, peb muab kev ntsuam xyuas ntawm cov tshuaj tiv thaiv nrov, nrog rau cov nqi tam sim no rau ib nrab xyoo 2019. Daim ntawv teev npe yuav tso cai rau koj los txiav txim siab seb lub putty rau hauv qab ntawm lub tsheb zoo dua thiab cov khoom siv ntau npaum li cas rau ib txoj haujlwm tshwj xeeb.

DINITROL anti-xeb series

Cov chaw tsim khoom hauv German tsim ntau cov tshuaj tiv thaiv, suav nrog cov tshuaj tua kab mob bituminous, tshuaj tsuag roj, thiab cov tshuaj tiv thaiv kab mob. Hauv kev muag khoom, ntxiv rau cov ntaub ntawv qub, kev kho tus kheej yog nqa tawm nrog cov kws tshaj lij hom tshuaj kho.

DINITROL 479 raws li cov roj hmab hluavtaws siv los ua kev tiv thaiv thoob ntiaj teb rau sab nrauv thiab sab hauv. Tsis muaj cov khoom hnyav, tsis corrode xim, yas, roj hmab. Nws muaj qhov elasticity tsawg, feem ntau yog siv rau hauv qab, qhov chaw pib, muab lub suab nrov tshaj plaws, tiv taus cov kua qaub thiab ntsev.

Anticorrosive muaj qhov adhesion siab, lub sijhawm tiv thaiv siab tshaj plaws yog 2 xyoos, tus nqi hauv khw Lavxias - aerosol tuaj yeem nrog ntim ntawm 100 ml - los ntawm 170 rubles. Kev ua haujlwm qis, 1 liter thawv - los ntawm 700 rubles.

Anticorrosive rau hauv qab SUPRA-SHIELD

Lub tuam txhab Lavxias ua ntau yam khoom siv los ua kom tiav kev tiv thaiv corrosion ntawm lub cev. Cov chaw tsim khoom tau hais kom ua haujlwm hauv lawv cov chaw, muab kev lees paub ntawm 1 xyoos.

Cov muaj pes tsawg leeg ntawm cov tshuaj tiv thaiv muaj xws li cov nplaum nplaum uas ua rau thaj tsam ntawm adhesion ntawm cov khoom siv rau cov xim, viscosity stabilizers, anticoagulants. Cov muaj pes tsawg leeg repels dej, tsim ib tug tuab tiv thaiv txheej, tsis vau los ntawm mechanical influences. Haum rau kev kho tus kheej hauv qab ntawm lub tsheb. Tus nqi ntawm ib txheej ntawm 10 litres 5 + 5 rau hauv qab thiab zais kab noj hniav yog 4500 rubles. Ntawm qhov tsis txaus, cov neeg tsav tsheb nco txog qhov tsis hnov ​​​​tsw tsw ntawm cov khoom, yog li nws yuav tsum tau hnav lub tshuab ua pa thaum ua haujlwm.

Anticor PRIM

Lub tuam txhab Lavxias teb sab Tekhpromsintez, ua ke nrog University of Munich, tsim Prim anti-corrosion agents rau kev kho mob ntawm txhua qhov chaw tsheb. Feature ntawm ntau lawm - tus nqi qis rau kev ua lag luam ntawm Lavxias Federation. Cov tshuaj tiv thaiv tau ntim rau hauv cov kaus poom aerosol thiab npaj rau kev kho tus kheej ntawm lub cev. Cov khoom tau muab faib ua:

• LUB TSEV. Anticorrosive rau sab nrauv ua hauv qab. Cov ntaub ntawv tsim cov matte elastic zaj duab xis ntawm cov hlau saum npoo, muaj cov khoom tiv thaiv dej, thiab tiv taus cov neeg kho tshuab kev puas tsuaj thiab kev ua ntawm reagents. Siv los ntawm sprayer los yog txhuam.
• PRIMML. Txhais tau tias tiv thaiv cov kab noj hniav zais: stringers, qhov rooj panels, thiab lwm yam. Sai sai nkag mus rau hauv microcracks, tsim ib lub microfilm. Anticorrosive yog resistant rau electrolytes, tsis rhuav tshem cov xim, roj hmab, repels ya raws. Tus nqi ntawm ib lub raj mis hauv 1 liter yog 1000 rubles.

Antikor NOVA

Anticorrosive ruaj khov Novax (RF) muaj qhov adhesion siab tshaj plaws. Hauv qab yog ua tiav ntawm nws tus kheej, cov khoom tau ntim rau hauv cov kaus poom aerosol yooj yim, raug nqi 200 rubles ib 400 ml. Nova BiZinc muaj cov stabilizer, corrosion inhibitor, reinforcing muab tub lim, thiab tuaj yeem siv rau cov pob xeb uas twb tshwm sim lawm.

Raws li tus qauv, qhov chaw ntawm lub cev thiab hauv qab yuav tsum tau kho ntawm qhov kub thiab txias ntawm 15 degrees, tab sis Nova anticorrosive tuaj yeem txau ntawm qhov kub thiab txias ntxiv 5.

Antikor Kordon

Ib cov tshuaj tiv thaiv corrosion los ntawm lub tuam txhab Polikom-Past (RF) muaj cov kaus poom aerosol rau kev ua haujlwm sab hauv thiab cov kaus poom rau kev tiv thaiv lub cev sab nraud. Bituminous mastics yog siv nrog txhuam, cov ntaub ntawv ua kua yog qhov zoo tshaj plaws txau nrog rab phom pneumatic. Cov khoom yog raws li ib tug polymer muaj pes tsawg leeg raws li bitumen.

Qhov kom zoo dua ntawm Cordon anti-corrosion txheej yog qhov ua haujlwm ntawm cov yeeb yaj kiab rau kev puas tsuaj thiab cov tshuaj tsis siv neeg. Txee lub neej mus txog 14 lub hlis, tom qab ntawd cov txheej yuav tsum tau rov ua dua tshiab. Cov khoom muaj nyob rau hauv cov nyiaj txiag ntu, tus nqi ntawm 1 kg ntawm putty pib los ntawm 200 rubles.

Anticor HB lub cev

Cov kab ntawm cov tshuaj tiv thaiv corrosion los ntawm Greek tuam txhab HB tau ua pov thawj nws tus kheej zoo. Lub cev tiv thaiv xim BODY yog muag hauv kilogram poom. Cov tshuaj tiv thaiv corrosion yog tsim los ntawm kev sib xyaw ntawm bitumen thiab roj hmab, vim yog kev ua haujlwm ntawm cov txheej txheem sab hauv hauv qab, lub suab rwb thaiv tsev ntawm lub alarm yog nce 11%. Aerosol cov kaus poom ntawm 400 ml nqi 290 rubles tau siv rau kev kho tus kheej.

Qhov nruab nrab kev pab cuam lub neej ntawm kev tiv thaiv yog 1,5 xyoo. Ib qho tshwj xeeb ntawm cov muaj pes tsawg leeg tseem muaj peev xwm siv cov txheej txheem los tiv thaiv gravel txheej thaum ua cov log arches.

Anticorrosive agents rau txhua qhov chaw RUST STOP

RUST STOP kab ntawm cov tshuaj tiv thaiv corrosion uas tsim nyob rau hauv Canada muaj qhov txawv tshwj xeeb tshaj plaws. Kev npaj tshuaj lom neeg nrog ntau yam kev ua haujlwm yog tsim los rau kev kho mob sab nraum zoov, sab hauv tsev thiab sab hauv tsev. Anticorrosives muaj lub hauv paus gel, tsis muaj ntxhiab tsw tshwj xeeb. Cov tshuaj tsuag los yog txhuam cov ntawv thov kev xaiv muaj. Tom qab ziab, qhov muaj pes tsawg leeg tsim cov yeeb yaj kiab tiv thaiv hauv qab, tiv taus kev puas tsuaj, resistant rau reagents, acids thiab ya raws. Tus nqi ntawm 1 kg ntawm cov nyiaj yog 1000 rubles.

Saib ntxiv: TOP 5 cov nplaum nplaum thiab cov sealants rau gluing thiab kho lub qhov rais tsheb

Underbody anticorrosives TECTYL

Anticorrosive Tectyl (Valvoline USA) yog tsim los rau cov tsheb khiav hauv huab cua. Qhov no yog txav mus rau hauv cov suab puam, nrog cov cua muaj zog, kev sib cuag tsis tu ncua ntawm hauv qab nrog reagents, acids thiab dej. Cov muaj pes tsawg leeg yog raws li tuab bituminous tebchaw rau kev kho mob ntawm lwm qhov chaw, tshuaj tsuag tshuaj muaj ib tug siab feem pua ​​ntawm paraffins. Zinc yeej ib txwm muaj nyob rau hauv muaj pes tsawg leeg ntawm anti-corrosion muaj pes tsawg leeg, uas muab cov hlau nrog ntxiv kev tiv thaiv.

Tus nqi ntawm ib lub raj mis ntawm 400 ml yog 700 rubles. Cov cuab yeej tseem raug muag hauv 1-kilogram jars; nws raug nquahu kom siv Tectyl anticorrosive tus neeg sawv cev tsis yog txhuam, tab sis nrog kev pab los ntawm lub tshuab compressor.

Anticorrosive rau hauv qab ntawm MERCASOL

Lub MERCASOL lub pas dej huv yog tsim los ntawm Swedish lub tuam txhab Auson. Cov muaj pes tsawg leeg suav hais tias yog qhov ruaj khov tshaj plaws, cov chaw tsim khoom tau lees paub cov hlau tiv thaiv corrosion mus txog 8 xyoo, raws li kev siv tshuab. Tus nqi yog 700 rubles ib 1 liter.

Cov kab muaj cov khoom sib cais rau kev ua haujlwm hauv qab, lub log arches, sab hauv. Rau cov keeb kwm yav dhau, MERCASOL 3 hom yog siv, muaj pes tsawg leeg yog ua los ntawm bitumen nrog ntxiv ntawm wax.

Rau qhov chaw sab hauv, nws raug nquahu kom siv cov tshuaj tiv thaiv los ntawm Noxudol-700 series ntawm tib lub chaw tsim khoom. Cov cuab yeej yog tsim los rau hauv tus account ib puag ncig cov qauv thiab tsis ua rau muaj kev tsis haum tshuaj vim tsis muaj cov kuab tshuaj.

Atikor Krown

Ib qho tshwj xeeb ntawm Krown oil-based anticorrosive agent yog lub peev xwm los ua lub cev tam sim ntawd tom qab ntxuav, tsis tas tos lub tsheb kom qhuav tag. Cov muaj pes tsawg leeg feem ntau yog siv rau sab hauv, cov khoom tsis corrode xim, roj hmab, yas thiab muab ceev ceev tiv thaiv kab noj hniav.

Krown 40 series yog siv rau kev ua haujlwm sab nraum zoov, thaum siv rau xeb, tus neeg sawv cev tsim cov yeeb yaj kiab tiv thaiv ntawm 0,5 hli, yog li khaws cia qhov chaw ntawm corrosion. Tus nqi ntawm 0,5 litre aerosol tuaj yeem pib los ntawm 650 rubles.

Anticorrosive universal LIQUI MOLY

LIQUI MOLY bitumen anticorrosive rau hauv qab ntawm lub tsheb yog suav tias yog qhov kev xaiv zoo tshaj plaws nyob rau hauv nqe lus ntawm tus nqi / zoo piv. Cov muaj pes tsawg leeg muaj xws li ib tug inhibitor, ib tug hnyav, ib tug hluavtaws resin puag thiab bitumen. Tom qab hardening, ib zaj duab xis elastic tseem nyob rau ntawm qhov chaw, uas tiv thaiv qhov chaw los ntawm cov teebmeem ntawm ntsev, noo noo thiab tiv taus txhua yam kev puas tsuaj.

Ua kom tiav ziab ntawm cov txheej tiv thaiv corrosion tshwm sim tsis pub dhau 12 teev, kev ua haujlwm tuaj yeem nqa tawm hauv chav ntub dej ntawm huab cua kub ntawm +3.

Dab tsi yog qhov txawv ntawm mastic rau qhov pib

Rau cov chaw pib sab nraud thiab hauv qab ntawm lub tsheb, nws raug nquahu kom siv putty. Cov khoom yog cais raws li qhov muaj pes tsawg leeg ntawm cov khoom, feem ntau yog:

• bitumen-polymer;
• roj hmab-bitumen;
• epoxy cob.

Epoxy putty nthuav tawm cov txiaj ntsig zoo tshaj plaws los tiv thaiv corrosion, lub ntsiab tsis zoo ntawm qhov tsis ruaj khov ntawm qhov kub thiab txias. Nyob rau theem qis dua 100 C, qhov muaj pes tsawg leeg tuaj yeem tawg.

Cov neeg tsav tsheb nyiam siv bituminous mastic, uas yooj yim rau siv nrog txhuam koj tus kheej. Qhov nruab nrab kev pab cuam lub neej ntawm cov muaj pes tsawg leeg yog 100 km.

Cov kws tshaj lij locksmiths pom zoo kom siv Antigravity anti-corrosion compound rau kev ua tiav, uas, tom qab daim ntawv thov, pleev xim rau cov xim tsim nyog. Putty txheej txheem hauv qab, arches thiab pob tw hauv pem teb. Qhov rai sills kho nrog putty zoo li dab tuag, koj yuav tsum siv overlays.

Yuav ua li cas kho lub hauv qab ntawm lub tsheb nrog mastic nyob rau hauv tsev

Anti-corrosion kev kho mob hauv qab ntawm lub tsheb yuav tsum tau npaj thiab nruj me ntsis raws li cov lus qhia; Thaum xaiv ib tug muaj pes tsawg leeg, coj mus rau hauv tus account:

1. Putty "Liquid plastic" yog siv los ua cov tshuaj tseem ceeb rau kev puas tsuaj rau pob zeb thiab ua rau kev tiv thaiv corrosion ntxiv.
2. Rubber putty muab kev tiv thaiv zoo tshaj plaws rau cov hlau, cov dej tsis zoo hauv qab mus txog 100%, ua tsaug rau nws cov elasticity, cov khoom yooj yim nkag mus rau hauv cov kab noj hniav.
3. Bituminous mastic yog siv rau hauv ib txheej txog li 0,4 hli. Ntxiv nrog rau kev tiv thaiv corrosion, cov khoom tiv thaiv gravel cuam tshuam cov cim.

Thaum nws tus kheej-tshuaj anticorrosive rau hauv qab, cov nram qab no algorithm ntawm kev ua hauj lwm yog siv:

1. Lub tsheb yuav tsum tau ua tiav hauv qhov kub ntawm +10 ... +25 degrees.
2. Nws yog ib qho tsim nyog yuav tsum tau thov kev tiv thaiv maj mam thiab hauv ib txheej txawm txog li 2 hli. Nws yuav shrink thaum nws dries.
3. Nws raug nquahu kom siv cov tshuaj tiv thaiv tsuas yog rau ntawm qhov chaw kho, xeb yuav tsum tau ntxuav, cov hlau yuav tsum tau xuab zeb.
4. Tsis txhob cia cov khoom tuaj rau hauv kev sib cuag nrog lub tshuab pa, lub cav, nres lossis txav qhov chaw ntawm lub tsheb.
5. Kev tiv thaiv yuav tsum tau siv raws li hauv qab no: hauv qab, kab noj hniav, lub log arches. Nyob rau hauv tsev, siv ib tug sprayer thiab ib tug mos txhuam, anticorrosive yog siv rau zais kab noj hniav nyob rau hauv qab.

Txawm hais tias cov chaw tsim khoom thov tias lawv cov xeb tshem tawm dries hauv 12 teev, cov kws kho tsheb tsis pom zoo pib lub tsheb tsawg kawg 24 teev tom qab kho.

Cov txheej txheem ywj pheej ntawm kev thov cov khoom siv tsis tas yuav tsum muaj kev txawj ntse ntxiv, tab sis yog tias tsis muaj qhov yooj yim ncej lossis elevator hauv chav nres tsheb, nws raug nquahu kom hu rau qhov kev pabcuam.