Home / Standards / GB/T 39863-2021 GB/T 39863-2021 Active Alumina ceramic substrate for copper clad laminate 覆铜板用氧化铝陶瓷基片 Standard Type GBT ICS 31.030 CCS L92 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A