The holes for the attachment bolts are reinforced by zinc plated sheet steel inserts. 为安装螺栓准备的孔都用镀锌钢板插入件加强。
Galvanized steel sheet and nonferrous welding presently pose a new challenge to the electrode material for resistance welding. 镀锌钢板，有色金属的焊接，目前是向电阻焊电极材料提出了新的挑战。
