Home / Standards / GB/T 30020-2023 GB/T 30020-2023 Active Test method for determing 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 现行 Issue Date 2023-03-17 Implementation 2023-10-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A