Home / Standards / GB/T 21836-2008 GB/T 21836-2008 Abolished Manganous manganic oxide for soft magnetic ferrites 软磁铁氧体用四氧化三锰 Standard Type GBT ICS 73.060.20 CCS D32 Status 废止 Issue Date 2008-05-13 Implementation 2008-11-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A