英语词汇“rag pump”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	rag pump
释义	rag pump /ˈraɡ pʌmp/ Mining. Now historical noun A chain-pump driven by a rag wheel. Origin Mid 18th century. From rag + pump.
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rag pump