Home / Standards / GB 21256-2007 GB 21256-2007 Abolished The norm of energy consumption per unit product of major procedure of crude steel manufacturing process 粗钢生产主要工序单位产品能源消耗限额 Standard Type GB ICS 27.010 CCS F01 Status 废止 Issue Date 2007-12-03 Implementation 2008-06-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委