Home / Standards / GB/T 16863-1997 GB/T 16863-1997 Active Method for testing refractive index of crystals 晶体折射率的试验方法 Standard Type GBT ICS 17.180.01 CCS N05 Status 现行 Issue Date 1997-06-16 Implementation 1997-12-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A