Daim iav tsis tooj liab VS kev cai teev hawm iav
Tsis muaj daim iav tooj liab super ntshiab ：
1.Tsis 1. Tsis hnav tsis kam, kev tiv nplaum thiab corrosion tsis kam ntawm
tooj liab tsom iav Lawv zoo dua li cov tsom iav nyiaj zoo tib yam.
2. Muaj kev cuam tshuam siab, cov duab pom tseeb, tsis muaj qhov sib txawv.
3. Tooj liab dawb, txhuas-dawb rau kev tiv thaiv ib puag ncig
kev coj ua daim iav nrog cov lus txhais zoo tib yam ：
1. Tsawg tus nqi, yooj yim oxidation thiab kev pab cuam luv neej
2. Tooj liab thiab txhuas, tsis yog ib puag ncig
3. tsis zoo zoo, yooj yim rau kev puas tsuaj
