名词
中文翻译：泵塞凸轮
同义词：
['plunger camshaft', 'plunger camshaft gearbox']
例句：
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1. Theplunger cam is responsible for controllingthe flow of oil in the engine.
泵塞凸轮负责控制发动机中油的流动。
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2. The plunger cam was designedto improve fuel efficiency by reducing friction.
泵塞凸轮设计用来减少摩擦，提高燃油效率。
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3. The plunger camshaft gearbox is a crucial component ofthe transmission system.
泵塞凸轮轴齿轮箱是传动系统的关键部件。