名词
中文翻译：顶杆
同义词：
['top', 'top plunger', 'plunger top']
例句：
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1.The top plunger is responsible for controlling the flow of oil.
顶杆负责控制油的流动。
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2. The top plunger was designed to improve the efficiency of the engine.
顶杆的设计是为了提高发动机的效率。
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3.The top plunger needs to be replaced regularly to maintain its performance.
顶杆需要定期更换以保持其性能。