Home / Standards / GB/T 20170.2-2006 GB/T 20170.2-2006 Active Test method of physical characters of rare earth metals and compounds Determination on specific surface area of rare earth compounds 稀土金属及其化合物物理性能测试方法 稀土化合物比表面积的测定 Standard Type GBT ICS 77.120.99 CCS H14 Status 现行 Issue Date 2006-04-13 Implementation 2006-10-01 Responsible Dept 国家发展改革委 Drafting Unit 国家发展改革委