erswersw
@erswersw
有効 (2年, 6か月前)ジャニラブポイント： 6
Product Introduction
Hot-dip galvanizing is the reaction of molten metal with an iron substrate to produce an alloy layer, thereby combining the substrate and the plating layer. Hot-dip galvanizing is to pickle iron and steel parts first. In order to remove iron oxide on the surface of iron and steel parts, after pickling, gi coil is cleaned in […] 表示
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