名词
中文翻译：下压柱塞
同义词：
['lower plunger', 'lower plunger', 'lower plunger例句：1. The lower plunger is responsible for the movement of the piston.（下压柱塞负责活塞的运动。）']
例句：
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1. The lower plunger is responsible for the movement of the piston.
下压柱塞负责活塞的运动。
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2. The lower plunger is used to control the flow of oil in the engine.
下压柱塞用于控制发动机中油的流动。
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3.The lower plunger was designed to improve the efficiency of the pump.
下压柱塞的设计旨在提高泵的效率。