... backed-up busbar 备用汇流排 backed-up power supply 备用电源 backed-up supply 应急电源 ...
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Power supply to DCS shall be from two different sources, Vital A (UPS) and one essential (backed up by diesel generator) or Vital B (UPS).
到DCS的电源应来自不同的两路电源， 至少有一路引自UPS，另一路可由柴油发电机备用或者也引自UPS。
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