piston oscillator

例句：

1. 1. The piston oscillator isused to measure the vibration of a machine.
   活塞振荡器用于测量机器的振动。
2. 2. Thepiston oscillator was designed todetect any irregularities in the machine's operation.
   活塞振荡器被设计用来检测机器运行中的任何异常。
3. 3. The pistonoscillator was used to test thestability of the machine's components.
   活塞振荡器被用来测试机器组件的稳定性。