Home / Standards / GB/T 39713-2020 GB/T 39713-2020 Active Testing mothed for specific surface area of ceramic powders—BET gas adsorption operation 精细陶瓷粉体比表面积试验方法 气体吸附BET法 Standard Type GBT ICS 81.060.30 CCS Q32 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A