Home / Standards / GB/T 27977-2022 GB/T 27977-2022 Active Test and calculation methods of electricity efficiency in cement production 水泥生产电能能效测试及计算方法 Standard Type GBT ICS 91.100.10 CCS Q11 Status 现行 Issue Date 2022-12-30 Implementation 2023-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A