The electromagnetic parameter of power transmission include: power frequency electrical field, power frequency magnetic field, radio inference (ri) and audible noise (an).

输电线路的电磁环境参数主要包括工频电场、工频磁场、无线电干扰和可听噪声四个方面。

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There are collective parameter method which is adopted in lightning protection rules, direct measurement method, electromagnetic field method and so on.

国内外对此的研究，主要有集中参数法(我国防雷规程采用)、直接测量法及电磁场法等方法。

youdao

There are collective parameter method which is adopted in lightning protection rules, direct measurement method, electromagnetic field method and so on.

国内外对此的研究，主要有集中参数法(我国防雷规程采用)、直接测量法及电磁场法等方法。

youdao