tachometer connection

例句：

1. 1.The technicians were busy troubleshooting the car's engine.
   技术人员忙于修理汽车的引擎。
2. 2. The engineers made a tachometer connection to monitor the speed of the vehicle.
   工程师们做了一个转速表连接来监测车辆的速度。
3. 3. During the test, the technicians had to make several tachometer connections.
   在测试期间，技术人员必须做几次转速表连接。