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安徽變電金具

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共有 1 安徽變電金具 廠家,在鋁雲匯發布了 2 安徽變電金具 產品信息。
是採用大芯數的電纜引接一般不應超過20m以盡量降低地線引接線的阻抗;(2)應盡量選擇較爲潮溼、鬆軟的地面開挖地線坑並且保證埋深不小於3m盡量降低地線的接觸電阻;(3)還應視具體
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