“Draeger breathing apparatus”的概念、定义、翻译、参考文献-科学参考

单词	Draeger breathing apparatus
释义	Draeger breathing apparatus [`drāg·ǝr `brēth·iŋ ´ap·ǝ´rad·ǝs] ^{MINING ENGINEERING} A long-service, self-contained oxygen-breathing apparatus with the oxygen feed governed by the lungs; allows the user to do hard work for up to 5 hours and normal work for 7 hours, and can sustain a resting individual for 18 hours.
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