Home / Standards / GB/T 29998-2013 GB/T 29998-2013 Active Benefit calculation to determine the mining and processing of low-grade ore of copper mine 铜矿山低品位矿石可采选效益计算方法 Standard Type GBT ICS 73.020 CCS D02 Status 现行 Issue Date 2014-08-01 Implementation 2014-08-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A