Down -conductor system connection should be welded, and the conclusion of common earthing system and adoption single earthing has been drawn.
引下线的连接应焊接，采用共用地网和一点接地方式接地等结论。
Down -conductor system connection should be welded, and the conclusion of common earthing system and adoption single earthing has been drawn.
引下线的连接应焊接，采用共用地网和一点接地方式接地等结论。
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