Cov cuab yeej ua kom dej-txo qis siv feem ntau siv hauv kev tsim kho, yog cov tshuaj ntxiv rau cov pob zeb ua kom zoo dua qub lossis ua cov cement.Lawm lawv muaj kev siv zoo ntawm lub luag haujlwm ntawm kev tsim vaj tsev muaj lub luag haujlwm zoo heev.Tab sis yog tias muaj qhov tsis zoo ntawm qhov xwm txheej, siv, yuav muaj yuav tsis muaj siv.Yog li cas peb ua kom lawv los ntawm spoiling?
Ib qho, qhov chaw khaws cia yuav tsum them sai sai.Yog zam kom tsis txhob lwj ntawm cov tshuaj ntxiv, peb yuav tsum them sai sai rau ib puag ncig thaum khaws cia.Yog hais tias muaj cov khoom xyaw noo hauv qhov chaw ib puag ncig, lossis corrosive gases lossis cov tshuaj yeeb dej caw, lawv yuav cuam tshuam rau kev ntxiv rau, ua rau muaj kev hloov pauv ntawm cov khoom tseem ceeb, ua rau cov yam ntxwv ntawm cov khoom uas tsis tuaj yeem, yog li them nyiaj rau qhov teeb meem ib puag ncig thaum khaws cia.
Thib ob, lawv lub neej txee kom them sai sai rau.Qhov cia thiab siv dej txo tus neeg sawv cev, peb kuj yuav tsum tau them sai sai rau lawv lub neej txee, nws tau nkag siab tias txhua qhov quav ntxiv muaj lub neej txee, thiab tsuas yog siv thaum lub neej txee. , los yog yuav muaj kev siv tsis raug lossis tsis zoo.Yog li no kawg, ua ntej siv, txee lub neej teeb meem kom pom, qhov no yog txoj hauv kev yooj yim kom tsis txhob muaj qhov tsis zoo.
Saum toj no 2 cov ntsiab lus, nws yog txoj kev tseem ceeb uas zam kev txo tus neeg ua dej, kom ntev li peb ua tib zoo saib rau ob lub ntsiab lus no, ntseeg, koj siv lawv, yuav yeej tau txais txiaj ntsig zoo siv.Yog hais tias, rau cov haujlwm tsim kho, tseem yuav ua si lub luag haujlwm zoo.
