piston wheel
noun
1A wheel or rotating disc carrying at its outer margin one or more pistons.
2(In a chain pump) a wheel carrying an endless chain bearing piston pumps.
Origin
Mid 19th century; earliest use found in Scientific American.
| 单词 | piston wheel |
| 释义 | piston wheelnoun 1A wheel or rotating disc carrying at its outer margin one or more pistons. 2(In a chain pump) a wheel carrying an endless chain bearing piston pumps. Origin |
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