Home / Standards / GB/T 10322.9-2023 GB/T 10322.9-2023 Active Iron ores—Determination of specific surface area—Test method using air-permeability apparatus (Blaine) 铁矿石 比表面积的测定 勃氏透气法 Standard Type GBT ICS 73.060.10 CCS D31 Status 现行 Issue Date 2023-09-07 Implementation 2024-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A