Design improving program for earth wire pole hanging plate of overhead transmission line and its hanging metal parts 输电线路架空地线电杆挂线板及悬垂金具设计改进方案
2.
The three - phase four - wire circuit should be adopted for the outgoing cable used by user , the earth wire should be installed , and the connection wire should be stable , safe , and reliable 用户使用的引出电缆线，应采用三相四线形式，应安装接地线，接线应牢固，安全可靠。
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