英语词汇“back-pressure valve”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	back-pressure valve
释义	DictionarySeecheck valve back-pressure valve back-pressure valve [′bak ‚presh·ər ‚valv] (petroleum engineering) A check valve installed in a natural-gas well bore to shut off gas flow while replacing the blowout preventer (used during drilling) with a christmas tree piping arrangement, which controls gas flow out of the completed well. check valve, back-pressure valve, reflux valve check valve An automatic valve which permits liquid to flow in only one direction. Also see non-return valve.
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back-pressure valve