英语词汇“standing valve”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	standing valve
释义	standing valve noun : a foot valve at the bottom of an oil-well pump
随便看	boundary layer boundary light boundary marker boundary rider bound bailiff bound charge bounded bounded boundedness bounded noun bounden bounder bounderish bounding boundingly boundless boundlessly boundlessness boundness bounds bounds bound up bound variable bound water bounteous

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