名词
中文翻译：膨胀器
同义词：
['expander', 'expander machine']
例句：
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1.The sweller is used to increase the volume of water in a tank.
膨胀机用于增加水箱的容积。
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2.The sweller is responsible for expanding the gas into the cylinder.
膨胀机负责将气体膨胀到气缸中。
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3.The sweller was designed to improve the efficiency of the oil refining process.
膨胀机被设计用来提高石油精炼过程的效率。