当外部电源故障，工厂自备包括柴油发电机，电池等供电设施。
But, if the power lines fail, the plants have redundant on-site power sources, including backup diesel generators and batteries.
以往经常用自备柴油发电机组、蓄电池、干电池和镍镉电池应急灯作为应急备用电源。
Traditionally, diesel oil-based generators, storage battery, dry battery and emergency lighting equipped Ni-Cd battery are always used as standby emergency power supply.
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