To introduce the process of wire drawing process, chemical Cu-plating process and formulation of top grade submerged-arc welding wire for pipeline steel.
介绍管线钢用高等级埋弧焊丝拉丝工艺、化学镀铜工艺及配方。
2
One-time linedrawing can be directly completed on the steel pipe by the utility model with exact linedrawing.