Cov yam ntxwv ntawm cov thawv ntim

1. Cov yam ntxwv ntawm cov iav ntim iav

Cov yam ntxwv tseem ceeb ntawm cov thawv ntim iav yog: tsis muaj tshuaj lom, pob tshab, pob tshab, cov teeb meem zoo nkauj, zoo nkauj, rov ua dua tshiab. Nws muaj qhov zoo ntawm cov cua sov ua kom tsis kam, siab tsis kam, thiab kev ntxuav tawm. Nws tuaj yeem ua kom tsis muaj menyuam nyob ntawm qhov kub thiab khaws cia thaum muaj kub tsawg. Nws yog qhov tseeb vim tias nws muaj ntau yam zoo uas nws tau dhau los ua cov khoom ntim khoom, xws li npias, kua txiv hmab txiv ntoo, thiab kua txiv ntoo.

2. Dab tsi yog cov txiaj ntsig ntawm kev siv iav ua lub thawv?

1. Cov khoom siv iav muaj cov khoom siv zoo, uas tuaj yeem tiv thaiv cov pa oxygen thiab lwm lub sijhawm tiv thaiv cov khoom sib xyaw ntawm cov ntsiab lus los ntawm kev nqus dej.
2. Cov fwj iav tuaj yeem siv ntau dua los txo cov nqi ntim cov nqi.
3. Cov thawv ntim khoom tuaj yeem raug xaiv nyob rau hauv ntau yam xim raws li kev cia yuav tsum tau ua.
4. Cov iav fwj muaj kev nyab xeeb thiab huv, muaj cov tshuaj corrosion tsis kam, thiab tsim nyog rau cov tshuaj acidic (xws li kua txiv thiab lwm yam kua txiv.