Vapor pov thawj thiab waterproof yog ob lo lus uas feem ntau tsis meej pem, tab sis lawv yeej muaj ntau lub ntsiab lus. Hauv cov ntsiab lus yooj yim, cov ntaub ntawv pov thawj vapor txhais tau hais tias cov khoom siv impervious rau kev nkag ntawm dej vapor, whereas waterproof txhais tau tias cov khoom muaj peev xwm tiv taus qhov nkag ntawm dej.
Txawm hais tias lawv yuav zoo li zoo sib xws, muaj qhov sib txawv tseem ceeb ntawm ob lub ntsiab lus. Txhawm rau kom nkag siab zoo dua qhov sib txawv, nws yog ib qho tseem ceeb uas yuav tsum xub txheeb xyuas seb txhua lo lus txhais li cas.
Vapor pov thawj yog hais txog cov khoom siv lossis cov khoom tsim los tiv thaiv cov dej vapor. Qhov no txhais tau hais tias cov khoom muaj peev xwm tiv thaiv kev sib kis ntawm cov dej noo ntawm ib qho mus rau lwm qhov. Qhov no feem ntau tseem ceeb nyob rau hauv cov xwm txheej uas cov dej noo tuaj yeem ua rau muaj kev puas tsuaj, xws li hauv kev khaws cia ntawm qee yam khoom.
Waterproof, ntawm qhov tod tes, hais txog cov khoom siv uas tsim los tiv thaiv kev nkag mus ntawm dej nws tus kheej. Qhov no txhais tau hais tias cov khoom muaj peev xwm tiv taus cov dej ntws thiab ua kom tsis txhob nkag mus rau thaj chaw tshwj xeeb. Qhov no feem ntau tseem ceeb nyob rau hauv cov xwm txheej uas dej raug dej tuaj yeem ua rau muaj kev puas tsuaj los yog ua rau muaj kev phom sij rau tib neeg lossis khoom siv.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum cov khoom siv tuaj yeem ua tau ob qho tib si vapor pov thawj thiab tsis muaj dej, ob tus yam ntxwv tsis tas ib txwm ua ke. Qee qhov xwm txheej, cov khoom siv yuav yog vapor pov thawj tab sis tsis muaj dej tsis zoo, lossis rov ua dua. Piv txwv li, ib daim ntaub qhwv yas tuaj yeem ua cov pov thawj vapor, ua kom cov dej noo nyob hauv, tab sis nws tsis yog dej tsis zoo thiab tuaj yeem tso dej nkag tau yooj yim.
Nyob rau hauv cov xwm txheej uas yuav tsum tau muaj ob qho tib si vapor pov thawj thiab cov khoom tsis muaj dej, nws yog ib qho tseem ceeb uas yuav tau xaiv cov khoom uas ua tau raws li ob qho kev cai. Qhov no tuaj yeem yog qhov tseem ceeb tshwj xeeb hauv cov ntawv thov xws li ntim lossis khaws cov khoom uas ob qho tib si noo noo thiab dej nkag tuaj yeem ua rau puas tsuaj lossis lwj.
Hauv kev xaus, thaum vapor pov thawj thiab tsis muaj dej tsis zoo yog cov ntsiab lus zoo sib xws, lawv tsis tuaj yeem hloov pauv thiab xa mus rau cov khoom sib txawv ntawm cov khoom siv. Nws yog ib qho tseem ceeb kom nkag siab txog qhov sib txawv thiab xaiv cov ntaub ntawv uas ua tau raws li cov kev cai tshwj xeeb ntawm txhua daim ntawv thov.
