英语词汇“free piston”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	free piston
释义	free piston noun : a combination of two pistons that are usually of different diameters, are rigidly attached to the same piston rod, work in different cylinders without external connection, and are used in some pumps and pressure gauges
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