名词
中文翻译：阀门旋转器
同义词：
['valve actuator', 'valve actuator valve']
例句：
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1. The valve-rotator is responsible for controlling the flow of oil through the engine.
阀门旋转器负责控制机油通过发动机的流动。
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2.The valve-rotator was designed to improve fuel efficiency and reduce emissions.
阀门旋转器设计用来提高燃油效率和减少排放。
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3.The valve-rotator has a small motor that powers it, allowing it to rotate quickly and smoothly.
阀门旋转器有一个小电机来驱动它，使其能够快速而平滑地旋转。