交换式电源供应系统，更省电，更安全。
Switching power supply system, safer and better for energy saving.
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。
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.
电力公司说，由于外部电源厂系统故障，由于外部电源供应问题导致了反应堆停运。
Tepco said the reactors shut due to the loss of offsite power due to the malfunction of one of two off-site power systems.
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