Home / Standards / GB/T 39798-2021 GB/T 39798-2021 Active Test methods for optical properties of glass used on multiple units 动车组玻璃光学性能试验方法 Standard Type GBT ICS 81.040.01 CCS Q34 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A