Home / Standards / GB/T 30020-2013 GB/T 30020-2013 Abolished Test method for the defects of glass - Photoelastic scanning method 玻璃缺陷检测方法 光弹扫描法 Standard Type GBT ICS 81.040.10 CCS Q30 Status 废止 Issue Date 2013-09-27 Implementation 2014-08-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A