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.
随便看	logsit logsitland logsitrep log slate logsm logsme logs me for logs off log somebody for log someone for log someone in log someone into log someone out log something for logs on logs one for logs out log-spectral-error log (speed) logs & records logs somebody for logs someone for logs something for logstar logstat

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