contact tachometer

例句：

1. 1.The engineer used a contact tachometer to measure the engine's speed.
   工程师使用接触式转速表来测量发动机的速度。
2. 2.The car's performance was tested using a contact tachometer.
   汽车的性能通过接触式转速表进行了测试。
3. 3. The technician adjusted the contact tachometer to ensure accurate readings.
   技术人员调整接触式转速表以确保准确的读数。