Traditionally, diesel oil-based generators, storage battery, dry battery and emergency lighting equipped Ni-Cd battery are always used as standbyemergencypower supply.
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。
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Beijing Electric Power Co. said it had 3,000 workers on standby in case of emergency.