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