differential cam

• 差分凸轮

differential cam的用法和样例：

例句

1. The adjusting screw rests on the high step of the cam.
   调节螺钉落在凸轮高点上。
2. If the follower loses contact with the cam, it will fail to work.
   假如随动件和凸轮脱离接触，就不能起作用。