英语词汇“piston wheel”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	piston wheel
释义	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.
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piston wheel