在远距离输送电能时若输电功率不变输电线的电阻不变为了减小输电线路上的电能损失从�电站�出的电能必须先经过变压器把电压电压升高从而 Sketch Coloring Page

在远距离输送电能时若输电功率不变输电线的电阻不变为了减小输电线路上的电能损失从�电站�出的电能必须先经过变压器把电压电压升高从而 Template

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tomski在远距离输送电能时若输电功率不变输电线的电阻不变为了减小输电线路上的电能损失从�电站�出的电能必须先经过变压器把电压电压升高从而 coloring

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