短语词组短语swaged welding tip 锻造焊嘴spot welding tip 点焊电极工作端Anti -blocking agent for welding tip 焊嘴防堵剂tip welding 板嘴焊接;切口堆焊Contact tip welding electrode 发明名称lance tip welding device 枪头焊接装置 返回 welding tip