Home / Standards / GB/T 23809.2-2020 GB/T 23809.2-2020 Active Emergency guidance systems—Setting principles and requirements—Part 2: Outside buildings 应急导向系统 设置原则与要求 第2部分：建筑物外 Standard Type GBT ICS 01.080.01 CCS A22 Status 现行 Issue Date 2020-03-31 Implementation 2020-10-01 Responsible Dept 国家标准委 Drafting Unit N/A