Home / Standards / GB/T 31288-2014 GB/T 31288-2014 Active Iron tailings sand 铁尾矿砂 Standard Type GBT ICS 91.100.30 CCS Q13 Status 现行 Issue Date 2014-12-05 Implementation 2015-10-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A