Home / Standards / GB/T 39975-2021 GB/T 39975-2021 Active Aluminum nitride ceramic dissipate heat substrates 氮化铝陶瓷散热基片 Standard Type GBT ICS 31.220 CCS L92 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A