英语词汇“demand mask”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	demand mask
释义	demand mask demand mask An oxygen mask through which oxygen flows only when the wearer inhales. There is no oxygen flow when the wearer is exhaling. Most combat aircraft have demand oxygen systems, and combat crews use demand masks.
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