In order to judge the climate condition control of overhead-line stress, it is of necessity to take account of climate condition control and hang-arc-distance restraint.
架空线路应力控制气象条件的判定，需要考虑控制气象条件及弧垂限制等条件，一般采用临界档距判定法或试推比较法处理。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
He gives brief account of some of 16 private museums in Shanghai and attempts to make analysis of their types, social roles, characters and the difficulties they arc facing.
作者简单介绍了上海市十六座私人博物馆中一些馆的情况，并试图对其类型、社会作用、及其困难作一些分析。
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