短语词组短语top bearing lock nut 上轴承锁紧螺母Input shaft bearing lock nut 输入轴轴承锁紧螺母bearing nut lock washer 轴承锁紧螺帽垫圈top bearing nut lock 上轴承锁紧螺母lock nut bearing 锁紧螺帽座 返回 bearing lock nut