名词
中文翻译：阀门活塞
同义词：
['valve stem', 'valve stem plunger', 'valve stem plunger']
例句：
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1. The valve plunger is used to control the flow of oil through the engine.
阀门活塞用于控制机油通过发动机的流动。
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2. The valve plunger was damaged during the installation process.
阀门活塞在安装过程中受损。
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3. The valve plunger needs to be replaced regularly to maintain proper functioning.
阀门活塞需要定期更换以保持正常工作。