Home / Standards / GB/T 12442-2019 GB/T 12442-2019 Active Test method for the hydroxyl groups content of silica glass 石英玻璃中羟基含量检验方法 Standard Type GBT ICS 81.040 CCS Q35 Status 现行 Issue Date 2019-08-30 Implementation 2020-07-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A