Cov txheej txheem nyiaj hluav taws xob ua los ntawm dej yog ua los ntawm cov dej tshwj xeeb, cov nyiaj ua los ntawm dej, cov khoom siv ntxiv thiab lwm yam khoom siv, ua kom zoo los ntawm cov thev naus laus zis siab heev, nws muaj cov yam ntxwv ntawm kev tawv ntawm cov xim pleev xim, tiv taus huab cua zoo, nplaum zoo rau cov ntaub ntawv hlau sib txawv, thiab nplaum zoo rau primer.
Cov yam ntxwv tseem ceeb
1. VOC tsawg, tsis muaj ntxhiab tsw khaus.
2. Ua raws li cov kev cai ntawm cov khoom lag luam ib puag ncig, tsis muaj kev pheej hmoo rau kev noj qab haus huv rau kev siv ib txwm muaj.
3. Zoo heev tiv taus ntau yam huab cua thiab ib puag ncig, tiv taus UV zoo heev.
4. Tom qab kho kom zoo lawm, cov xim pleev xim yuav tawv thiab tiv taus kev sib txhuam thiab kev cuam tshuam zoo heev.
5. Hauv cov dej-raws li primer txhawb kev siv, tuaj yeem tiv taus qhov cuam tshuam ntawm kev lag luam ib puag ncig.
Pom zoo kom siv rau hauv cov tshuab loj, cov khoom siv hauv kev lag luam, cov khoom siv ntxiv, cov chaw tiv thaiv ib puag ncig, cov tshuab hluav taws xob, cov qauv hlau, thiab lwm yam. C1, C2 ib puag ncig tiv thaiv qib txheej.
Lub sijhawm tshaj tawm: Lub Peb Hlis-14-2024