timer shaft cam

例句：

1. 1. The timer shaft cam is responsible for timing the start of the engine.
   计时轴凸轮负责控制发动机的启动时间。
2. 2. The engineer used a timer shaft cam to ensure the machine operated smoothly.
   工程师使用计时轴凸轮来确保机器平稳运行。
3. 3. The timer shaft cam was designed to minimize vibration and noise during operation.
   计时轴凸轮的设计旨在减少操作过程中的振动和噪音。