短語(yǔ)詞組短語(yǔ)welding g unit 焊機(jī)welding pipe unit 焊管機(jī)組welding zone unit 非靈敏區(qū)模擬裝置arc welding power unit 弧焊電源multiple -operator welding-unit 多重操作焊接單元gas welding unit 氣焊工具welding current decay unit [機(jī)]焊接電流衰減器welding slag cleaning unit 清渣機(jī)generator welding unit 電動(dòng)直流發(fā)電焊接設(shè)備 返回 welding unit