lightning protection down conductors
...Lightning protection down conductors 用于雷电防护的避雷针 According to IEC 61024-1-2 down conductors must be erected from the roof to the foundation earth in the outer walls of b...
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lightning protection down conductors
避雷导线
以上为机器翻译结果，长、整句建议使用 人工翻译 。