... lightning overvoltage 雷电过电压 lightning protected cable 防雷电缆 lightning protection equipment 雷电保护装置 ...
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Mains and external signal cables longer than 10 m shall in areas where lightning is frequent be protected with an external lightning surge protection at the cable entrance to the building.
主线和外部信号线超过10米的,在线进入大楼的入口处时设置避雷保护,避免雷击。
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