英语词汇“bump-down”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	bump-down
释义	bump-down bump-down [′bəmp‚dau̇n] (petroleum engineering) In an oil well pumping operation, the pump's hitting the bottom in the downstroke because the rod between the pumping jack and the pump seat is too long.
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