英语词汇“double valves”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	double valves
释义	double valves double valves [¦dəb·əl ′valvz] (petroleum engineering) Two valves in series used as subsurface traveling or standing valves in wells, the dual arrangement being more reliable than a single valve.
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