Home / Standards / GB/T 39809-2021 GB/T 39809-2021 Active Measuring method of the energy consumption of flat glass furnace 平板玻璃窑炉能耗测定方法 Standard Type GBT ICS 81.100 CCS Q30 Status 现行 Issue Date 2021-03-09 Implementation 2022-02-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A