pullback cam disc

例句：

1. 1. The engineer used a pullback cam disc to adjust the gear ratio.
   工程师使用回拉式凸轮盘来调整齿轮比。
2. 2. During the manufacturing process, the pullback cam disc was used to control the cutting speed.
   在制造过程中，回拉式凸轮盘用于控制切割速度。
3. 3. The pullback cam disc was designed to minimize vibration during the assembly process.
   回拉式凸轮盘的设计旨在最小化组装过程中的振动。