| 摘要 |
PURPOSE:Molten metal plated steel tube, having a high plate preserving quality and beautiful apperarance optically, plated molten metal forming many uneven part having a specific depth and diameter on the surface of the steel tube. CONSTITUTION:Molten metal plated steel tube is made by plating several mu - several tens mu thickness of molten metal, after projecting abrasives on the surface of the steel tube by shot blast apparatus and uniformly forming several mu - several tens mu depth and several mu - several handreds mu of many uneven part. |
