The holes for the attachment bolts are reinforced by zinc plated sheet steel inserts. 為安裝螺栓準備的孔都用鍍鋅鋼板插入件加強。
Galvanized steel sheet and nonferrous welding presently pose a new challenge to the electrode material for resistance welding. 鍍鋅鋼板，有色金屬的焊接，目前是向電阻焊電極材料提出了新的挑戰。
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