They are widely used in rescue or telecommunication facilities as mobile back-up power supply, in industrial mining, rural areas and oil fields as temporary emergency power supply.

应用于军事、救灾抢险或电讯设施，作为机动备用电源；应用于工矿、农村和油田，作为临时应急电源。

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Power system protection work, when power lines were damaged or for other reasons the system back-up power supply is still able to work more than 24 hours, calls will be automatically recharged after.

系统有断电工作保护功能，当电源线路被破坏或由于其他原因断电时系统备用电源仍能继续工作24小时以上，来电后将会自动充电。

youdao

The quake and tsunami cut the supply of off-site power to the plant and diesel generators intended to provide back-up electricity to the cooling system.

这次强烈的地震和海啸毁坏了电厂的外部电源和以柴油为动力的后备电源。这些电源是用于和电站紧急情况下为冷却系统提供电力供应的电源。

youdao

The back-up power supply includes six diesel engine generators with ten days of fuel.

FORBES: Double Dutch No Longer

The back-up power supply includes six diesel generators with ten days of fuel.

FORBES: International

The capital's main surgical hospitals and water treatment plants now rely solely on back-up generators because the normal power supply has been cut, an untenable situation, Doumani said.

CNN: Baghdad running low on medicine