iav da dej qhov rooj pob khawm, iav kho vajtse fittings:

Thaum koj mus rau lub khw muag khoom iav los xaiv iav kho vajtse lossis iav kho vajtse fittings, Saib ntawm qhov chaw ntawm cov phuam da dej feem ntau pom nws txoj kev kho electroplating.Electroplating kev kho mob muab lub ntsej muag ci dua thiab ua rau muaj kev tiv thaiv corrosion.Txawm li cas los xij, yog tias kev kho plating tsis zoo, qhov chaw tsis sib xws, nws yuav yooj yim poob rau hauv kev siv, thiab yuav sai sai.Yog li xaiv ib qho khoom du thiab huv si nrog cov txheej du