Home / Standards / GB/T 39776-2021 GB/T 39776-2021 Active Measuring and calculating methods of heat balance and heat efficiency of tunnel kiln of brick industrial 砖瓦工业隧道窑热平衡、热效率测定与计算方法 Standard Type GBT ICS 27.010 CCS F04 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 国家标准委 Drafting Unit N/A