Home / Standards / GB/T 3520-2024 GB/T 3520-2024 Active Test method for fineness of graphite 石墨细度试验方法 Standard Type GBT ICS 73.080 CCS Q51 Status 现行 Issue Date 2024-10-26 Implementation 2025-05-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A