英语词汇pneumatic trough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	pneumatic trough
释义	pneumatic trough noun Chemistry a shallow liquid-filled container with which gases can be collected by displacing liquid from a jar inverted in the trough 【化】集气槽。
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