城网建设与改造的特点之一是变电所的小型化和采用电缆出线。
Substation miniaturization and cable output feeder is one feature of city power grid construction and alteration.
最后，运用本文所建立的指标体系和所提出的方法，对某地方供电公司某一期实际城网建设与改造项目的经济效益进行了实例分析。
The proposed index system and method are applied to a practical urban network construction project of a supply company, and numerical results verify the correctness and validity of them.
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