Home / Standards / GB/T 26564-2011 GB/T 26564-2011 Active Magnesia-Alumina Spinel 镁铝尖晶石 Standard Type GBT ICS 81.08 CCS Q43 Status 现行 Issue Date 2016-03-04 Implementation 2012-02-01 Responsible Dept N/A Drafting Unit N/A