Home / Standards / GB/T 2272-2009 GB/T 2272-2009 Abolished Ferrosilicon 硅铁 Standard Type GBT ICS 77.100 CCS H42 Status 废止 Issue Date 2009-07-08 Implementation 2010-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A