Home / Standards / GB/T 12442-1990 GB/T 12442-1990 Abolished Test method for the hydroxyl groups contentof silica glass 石英玻璃中羟基含量检验方法 Standard Type GBT ICS 81.040 CCS Q35 Status 废止 Issue Date 1990-07-21 Implementation 1991-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A