Emergencyoxygen supply system, allowing passengers from chemical gas attacks.
紧急氧气供给系统，可以让乘客免受化学气体的攻击。
2
Volodymiyr Shandra, the Ukrainian Emergency Situations minister, told local media that oxygen canisters being stored in the basement of the building could have triggered the blasts.
乌克兰紧急情况部部长弗拉基米尔·珊德拉告诉当地媒体，存放在大楼地下室的氧气罐可能引发了爆炸。
3
It's a source of emergency air on planes, submarines, and spacecraft that releases oxygen when heated.