Home / Standards / GB/T 20214-2006 GB/T 20214-2006 Active Crystalline layered sodium disilicate 层状结晶二硅酸钠 Standard Type GBT ICS 71.060.50 CCS G70 Status 现行 Issue Date 2006-03-31 Implementation 2006-10-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A