self-contained oxygen breathing apparatus
自供电系统：self-powered systems 自给式氧气呼吸器：self-contained oxygen breathing apparatus 自给式手提蓄电池电灯：self-contained portable electric lamp ..
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self-contained oxygen breathing apparatus
自给式氧气呼吸器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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