cam brake

例句：

1. 1. 制动器
   名词
2. 2.制动
   动词
3. 3. 刹车
   名词
4. 1.The car's cam brake is working properly.
   汽车的液压刹车工作正常。
5. 2.The driver applied the brakes to stop the car.
   司机踩下刹车使汽车停下。
6. 3.The train's cam brake was activated automatically.
   火车的液压制动器自动启动了。