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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 17949.1-2000 |
Guide for measuring earth resistivity，ground impedance and earth surface potentials of a ground system--Part 1:Normal measurements 接地系统的土壤电阻率、接地阻抗和地面电位测量导则 第1部分:常规测量 |
China National Standards potentials |
 English PDF |
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