Home / Standards / GB/T 29421-2012 GB/T 29421-2012 Active Vanadate birefringent crystal devices 钒酸盐双折射光学单晶元件 Standard Type GBT ICS 17.180 CCS A60 Status 现行 Issue Date 2012-12-31 Implementation 2013-08-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A