英语词汇“backing 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	backing pump
释义	backing pump backing pump [′bak·iŋ ‚pəmp] (mechanical engineering) A vacuum pump, in a vacuum system using two pumps in tandem, which works directly to the atmosphere and reduces the pressure to an intermediate value, usually between 100 and 0.1 pascals. Also known as fore pump.
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