Personnel, including rescue workers, should not enter areas where the oxygen concentration is below19.5%, unless provided with a self-contained breathing apparatus (SCBA) or airline respirator.
除非备有自己式呼吸器（SCBA）或空气管呼吸器，任何人，包括救援人员，都不能进入氧浓度低于19.5%的区域。
Mitochondria of cells in the breathing apparatus, through the consumption of oxygen to produce carbon dioxide.
线粒体是细胞中的呼吸器，通过消耗氧气来产生二氧化碳。
Mitochondria of cells in the breathing apparatus, through the consumption of oxygen to produce carbon dioxide.
线粒体是细胞中的呼吸器，通过消耗氧气来产生二氧化碳。
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