短語詞組短語joint -welding sequence 接頭焊接順序Threaded joint welding seats 螺紋接頭焊接座edge joint welding 端接接頭焊接butt joint welding 對頭熔接Joint welding procedure 接頭焊接工藝規(guī)程butt joint welding process 對接焊工藝joint welding sequence 接頭焊接程序Coil Joint Welding Machine 金屬鋼帶裁接機overlap joint welding 電渣壓力焊 返回 joint welding