Hom A kav feem ntau welded nrog cov pa roj carbon zoo tib yam Q235, Q235F thiab zoo tib yam uas tsis tshua muaj hlau alloy 16Mn, thiab hom B kav yog welded nrog steels xws li Q235, Q235F, Q195, thiab lwm yam., thiab yog siv raws li cov dej tsis tshua muaj siab conveying. cev.

