-
Cov txheej txheem khoom yog dab tsi?
txheej txheem Workpiece → degreasing → dej ntxuav → pickling → dej ntxuav → immersion nyob rau hauv pab plating hnyav → ziab thiab preheating → kub-dip galvanizing → tiav → txias → passivation → yaug → ziab → tshuaj xyuas (1) Degreasing tshuaj dej los yog hlau degreasing degreasing cov kua...Nyeem ntxiv
