英语词汇“pumping jack”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	pumping jack
释义	pumping jack noun : a device over a deep well for operating a pump by belt power
随便看	languishment languor languorous languorously langur langur lani lani- laniard laniarius laniary laniate laniidae la nina laning lanista lanius la niña lank lankan lankily lankiness lankish lankly lankness

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