But what happens in the case of a power failure or system crash?
但是，如果出现系统电源故障或者崩溃，又会发生什么情况呢？
An oxygen mask will come down from overhead in case of emergency.
如果发生紧急情况，头顶上会放下一只氧气面罩。
In case act of violence, on site security personnel should immediately call security manager and on call Duty personnel.
如果发生暴力行为，现场安全保卫人员应立即打电话给安全经理与候叫人员。
In case of fire do not use the lift.
如果发生火灾，不要使用电梯。
In case of fire, break the bottle.
如果发生火灾，请把瓶打破。
In case of fire, dial 119 at once.
如果发生火灾，立即拨打119。
In case of fire, sound the fire alarm.
如果发生火灾，请按警铃。
In case of emergency, please cut off electricity.
如果发生紧急情况，请切断电路。
In case of emergency, please cut off electricity.
如果发生紧急情况，请切断电路。
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