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GB 50057-2010 第2.0.3条 Code for Design Protection of Structures Against Lightning

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GB 50057-2010 第2.0.3条

| | **Grounding device**: The general term for grounding electrodes and grounding conductors buried in soil or concrete foundations. Its grounding resistance value shall comply with: Class I lightning protection ≤10Ω, Class II lightning protection ≤10Ω, Class III lightning protection ≤30Ω. |

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