Home / Standards / GB/T 21836-2024 GB/T 21836-2024 Active Manganous manganic oxide 四氧化三锰 Standard Type GBT ICS 77.100 CCS D 32 Status 现行 Issue Date 2024-04-25 Implementation 2024-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A