英语词汇direct expansion refrigeration system怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	direct expansion refrigeration system
释义	direct expansion refrigeration system 简明释义直接膨胀式制冷系统专业释义 1 交通运输工程直接膨胀式制冷系统双语例句 1 Contrast experiments between gravity feeding and direct expansion refrigeration system were carried on, performance characteristics difference of the two refrigeration systems were found out. 并与直接膨胀供液制冷系统做同工况下的对比实验，分析两种系统的工作特性差异。
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