Home / Standards / GB/T 24244-2009 GB/T 24244-2009 Active Iron oxide for ferrite 铁氧体用氧化铁 Standard Type GBT ICS 77.160 CCS H54 Status 现行 Issue Date 2009-07-15 Implementation 2010-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A