Home / Standards / GB/T 39865-2021 GB/T 39865-2021 Active Method for measuring refractive index of uniaxial optical crystals 单轴晶光学晶体折射率测量方法 Standard Type GBT ICS 17.180 CCS Q65 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