Home / Standards / GB/T 21236-2007 GB/T 21236-2007 Active Silica fume from electric-furnace 电炉回收二氧化硅微粉 Standard Type GBT ICS 73.080 CCS H31 Status 现行 Issue Date 2007-10-25 Implementation 2008-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A