英语词汇“pressure-maintaining valve”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	pressure-maintaining valve
释义	pressure-maintaining valve pressure-maintaining valve A valve in the pneumatic system that ensures that if the air bottle pressure falls below a preset value it will close and prevent air passing to the nonessential services. It thus ensures that air is available for the operation of essential services.
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