Home / Standards / GB/T 39069-2020 GB/T 39069-2020 Active Grade requirements for office building 商务楼宇等级划分要求 Standard Type GBT ICS 03.080.01 CCS A00 Status 现行 Issue Date 2020-09-29 Implementation 2021-04-01 Responsible Dept 市场监管总局 Drafting Unit N/A