Daim Ntawv Thov Ntau Ntawm Cov Ntaub Ntawv Tiv Thaiv Zaj Duab Xis

Nws yog siv los tiv thaiv cov ntaub pua plag thiab cov ntaub pua plag zoo li cov hniav zoo nkauj (xws li phab ntsa); cov ntaub pua plag hauv tsheb, cov ntaub pua plag zoo li cov hniav zoo nkauj, thiab cov rooj zaum fiber ntau.
Xim hom: pob tshab, dub thiab dawb, dawb (mis nyuj dawb), xiav. Cov xim kuj tuaj yeem kho raws li cov neeg siv khoom xav tau lossis cov qauv