Cov txiaj ntsig ntawm kev thov cov ntawv ntim khoom yas

Yas ntim nruas yuav tsum tsis siv rau qhov chaw muaj peevxwm kub. Qhov kub dhau heev yuav ua rau nws muag thiab deform, thiab cov nyhuv yuav tsis zoo thaum siv yav tom ntej. Cov thawv ntim khoom yas tsis yooj yim los khaws cov khoom uas muaj xeb, thiab lawv ruaj thiab tsis tuaj yeem tiv taus lub sijhawm ntev ntawm cov kua qaub thiab cov tshuaj alkali. Tom qab tag nrho, nws yog cov khoom yas. Ntxiv rau, lwm yam khoom yuav tsum zam kom ntau li ntau tau. Thaum kos tau, nws yog tsis yooj yim sua kom rov ua tus thawj du thiab zoo nkauj. https://www.fhpails.com/