英语词汇“float collar”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	float collar
释义	float collar float collar [′flōt ‚käl·ər] (petroleum engineering) A specialized coupling device inserted in a casing string just above the bottom that contains a check valve to permit downward passage of fluid but not upward passage through the casing.
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