Home / Standards / GB/T 221-2008 GB/T 221-2008 Active Method for designation of steel products 钢铁产品牌号表示方法 Standard Type GBT ICS 77.140.01 CCS H40 Status 现行 Issue Date 2018-02-06 Implementation 2009-04-01 Responsible Dept N/A Drafting Unit N/A