英语词汇“reduced-pressure-principle backflow preventer”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	reduced-pressure-principle backflow preventer
释义	reduced-pressure-principle backflow preventer reduced-pressure-principle backflow preventer reduced-pressure-principle backflow preventer A backflow preventer that consists of two independently-operating check valves that
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