System structure and operation of power system of the main structure of power supply, power networks and load center.

系统构成与运行电力系统的主体结构有电源、电力网络和负荷中心。

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This operation center, in addition to the completion of the integration with the brilliant team of Nantong, one of the main purposes is to help the latter to establish channels and urban marketing.

这个运营中心，除了完成与南通辉煌的团队融合外，主要目的之一是帮助后者建立起渠道和城市营销。

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Grand Canyon National park will reduce hours of operation at the main visitor center, affecting at least 250, 000 people.

CNN: STORY HIGHLIGHTS