短语词组短语worm -gear case 蜗轮箱;涡轮箱worm reduction gear unit 蜗杆减速齿轮箱the worm and gear 蜗轮蜗杆WORM REDUCTION GEAR 蜗轮减速机;减速机;翻译worm steering gear 蜗杆转向装置worm barring gear 蜗轮传动装置worm and gear transmission 蜗杆传动 返回 worm gear