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 ..
双语例句
1
Personnel, including rescue workers, should not enter areas where the oxygen concentration is below19.5%, unless provided with a self-containedbreathingapparatus (SCBA) or airline respirator.