Home / Standards / GB 21257-2007 GB 21257-2007 Abolished The norm of energy consumption per unit product of caustic soda 烧碱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 N/A