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NDB平原地带和山区地带的地网接地电阻分别应小于(
分类: 导航专业业务
发布时间: 2023-11-19 22:59
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NDB平原地带和山区地带的地网接地电阻分别应小于(
A.A、1欧、4欧
B.B、4欧、1欧
C.C、2欧、4欧
D.D、4欧、2欧
正确答案是C
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