At present, Urban electricity system exists unstable factor, for guaranteed the normal supply of power for computer and network system, UPS should be used to supply uninterrupted electric power.
目前，我们现有的市电系统存在不稳定因素，为保证计算机和网络系统的供电正常，应使用UPS不间断供电电源。
Urban medium-voltage distribution network, one of the most important parts of power system, is expected to distribute electric energy to consumers with considerable security and reliability.
城市中压配电网是整个电力系统的重要组成部分，其功能是将电力安全、可靠地分配到用户。
Urban medium-voltage distribution network, one of the most important parts of power system, is expected to distribute electric energy to consumers with considerable security and reliability.
城市中压配电网是整个电力系统的重要组成部分，其功能是将电力安全、可靠地分配到用户。
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