短語(yǔ)詞組短語(yǔ)electric resistance butt welding 電阻對(duì)焊electric butt welding welding 電阻接觸焊electric -melting butt welding 電熔對(duì)接electric arc lighting butt welding 電阻接觸焊electric railway resistance butt welding 電阻對(duì)焊 返回 electric butt welding