短语词组短語HELICAL -WORM GEAR MOTOR 減速機helical -worm gear reducer 斜齒輪worm helical gear transmission 蝸杆斜齒輪傳動worm helical gear wheel drive 蝸杆斜齒輪傳動worm - helical gear 斜齒輪傳動付worm and helical gear 蝸杆斜齒輪 返回 helical worm gear