hand brake chain guide

例句：

1. 1. The hand brake is designed to preventthe car from moving while the driver isin the seat.
   手刹设计用来在驾驶员坐在驾驶座时防止汽车移动。
2. 2. Thehandbrake was difficult to operate andrequired a lot of practice to master.
   手刹操作起来很困难，需要大量的练习才能掌握。
3. 3. The chainguide ensures that the chainruns smoothly through the gearswithout binding or slipping.
   链条导向器确保链条顺畅地通过齿轮，不会卡住或滑动。