Home / Standards / GB/T 30083-2013 GB/T 30083-2013 Active Copper,lead and zinc ores and concentrates―Precision and bias of mass measurement techniques 铜、铅和锌矿及精矿 计量方法的精密度和偏差 Standard Type GBT ICS 77.120.01 CCS D42 Status 现行 Issue Date 2013-12-17 Implementation 2014-09-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A