Home / Standards / GB/T 27679-2011 GB/T 27679-2011 Active Copper, lead, zinc and nickel concentrates - Experimental methods for checking the precision of sampling 铜、铅、锌和镍精矿 检查取样精密度的实验方法 Standard Type GBT ICS 77.120.30;77.120.01 CCS D42 Status 现行 Issue Date 2011-12-30 Implementation 2012-10-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A