Home / Standards / GB/T 9971-2004 GB/T 9971-2004 Abolished Pure iron for raw material 原料纯铁 Standard Type GBT ICS 77.080.10 CCS H53 Status 废止 Issue Date 2004-03-24 Implementation 2004-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会