在做設計時,接地線電阻是如何算的?還是估計的?還是有規定? - 生活

By Eden
at 2012-07-10T00:00
at 2012-07-10T00:00
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在做設計時,接地線電阻是如何算的?還是估計的?還是有規定?
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生活
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By Una
at 2012-07-10T16:25
at 2012-07-10T16:25

By Belly
at 2012-07-13T14:50
at 2012-07-13T14:50
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