Home / Standards / GB/T 3519-2023 GB/T 3519-2023 Active Cryptocrystalline graphite 微晶石墨 Standard Type GBT ICS 73.080 CCS Q51 Status 现行 Issue Date 2023-11-27 Implementation 2024-06-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A