arc c welding 电弧焊 ; 弧焊

automatic c welding 自动焊接

automatic c arc welding machine 自动电弧焊机

heliarc c welding 氦弧焊

arc c welding robot 弧焊机器人

metal-arc c welding 金属极电弧焊

arc c welding machine 弧焊机

arc c welding electrode 电弧焊条