Home / Standards / GB/T 32661-2016 GB/T 32661-2016 Active Spherical silica powder 球形二氧化硅微粉 Standard Type GBT ICS 81.040.30 CCS Q35 Status 现行 Issue Date 2016-04-25 Implementation 2017-03-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A