Home / Standards / GB/T 20170.1-2006 GB/T 20170.1-2006 Active Test methods for physical characters of rare earth metals and their compounds Determination for particle size distribution of rare earth compounds 稀土金属及其化合物物理性能测试方法 稀土化合物粒度分布的测定 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