短語詞組短語automatic TIG orbital welding 全位置TIG焊tig mag welding tig 焊TIG Arc welding machine 鎢極氬弧焊機tig arc welding tig 焊接tig butt welding tig 對接焊tig automatic welding tig 自動焊pulsed tig arc welding 脈沖鎢極氬弧焊tig spot welding 鎢極惰性氣體保護點焊TIG spot welding TIG 點焊 返回 tig welding