idler screw是什么意思

网络释义

1)idler screw,张紧轮螺钉2)Jack bolts,张紧螺钉3)idler subspring screw,张紧轮下弹簧螺钉4)idler locknut,张紧轮锁紧螺母5)wheel screw,手轮锁紧螺钉6)tension wheel adjusting bolt,张紧轮调整螺栓