Home / Standards / GB 20664-2006 GB 20664-2006 Active Limitation concentration of natural radioactivity in non-ferrous metal ores and concentrates products 有色金属矿产品的天然放射性限值 Standard Type GB ICS 73.060 CCS D40 Status 现行 Issue Date 2006-12-07 Implementation 2007-05-01 Responsible Dept 生态环境部 Drafting Unit N/A