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計算機占去該國商業(yè)用電的5%。Computers account for 5% of the country'scommercial electricity consumption.你們的集中供熱設備是煤氣的還是用電的?Is your central heating gas or electricity?對用電的總負荷要嚴格核算, 不得超荷.Total power load must be checked strictly, ...