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

单词	Draeger escape apparatus
释义	Draeger escape apparatus [`drāg·ǝr ǝ`skāp ´ap·ǝ´rad·ǝs] ^{MINING ENGINEERING} A portable, self-contained oxygen- breathing apparatus that is carried on the back of the user; protects against poisonous gases or oxygen shortages for 1 hour.
随便看	overpoint mean time between failures mean-time screw mean time to failure mean time to repair mean-tone scale mean trajectory mean value mean value theorem mean velocity mean water level measles measles encephalitis measles immune globulin measles virus vaccine measly measurable function measurable set measurable space measurand transmitter measure measured daywork measured drawing measured drilling depth measured mile

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