Awọn irin aise ohun elo ti wa ni akọkọ galvanized lati gbe galvanized, irin, ati ki o si awọn irin paipu ṣe nipasẹ ranse si-processing ni a npe ni galvanized rinhoho, irin pipe, tun mo bi ami-galvanized, irin pipe.Ni akọkọ, awọn ohun elo aise irin ni a ṣe sinu awọn paipu irin lasan ti wede ti a beere…
Ka siwaju