Home / Standards / GB/T 21779-2008 GB/T 21779-2008 Abolished Test method for particle size distribution of metal powders and related compounds by light scattering 金属粉末和相关化合物粒度分布的光散射试验方法 Standard Type GBT ICS N/A CCS A80 Status 废止 Issue Date 2008-05-12 Implementation 2008-09-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委