短語詞組短語submerged arc automatic welder 埋弧自動焊機submerged arc stud welder 埋弧螺柱焊機arc fusing welder 電弧熔焊機arc spot welder 電弧點焊機arc -welder lung 電弧焊工肺automatic arc -welder 自動弧焊機arc ot welder 電弧點焊機submerged arc guaranteed welder 埋弧自動焊機AC arc -welder 交流弧焊機 返回 arc welder