名词
中文翻译：活塞环颤动
同义词：
['pistonring vibration', 'piston ring oscillation']
例句：
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1. The engine's piston rings were causing alot of noise during the startup process.
发动机的活塞环在启动过程中引起了很多噪音。
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2.The technician had to replace the pistonrings due to their excessive wear.
技术人员不得不更换磨损过度的活塞环。
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3. During the operation, the piston rings flutteredaround the cylinder walls, causing concern forthe safety of the machine.
操作过程中，活塞环在气缸壁上来回摆动，引起了对机器安全性的担忧。