Home / Standards / GB/T 21431-2023 GB/T 21431-2023 Active Technical specification for inspection of lightning protection systems of buildings 建筑物雷电防护装置检测技术规范 Standard Type GBT ICS 91.120.40 CCS K 04 Status 现行 Issue Date 2023-12-28 Implementation 2024-07-01 Responsible Dept 国家标准委 Drafting Unit N/A