Home / Standards / GB/T 11297.12-2012 GB/T 11297.12-2012 Active Test method for extinction ratio of optical crystal 光学晶体消光比的测量方法 Standard Type GBT ICS 31.140 CCS L21 Status 现行 Issue Date 2012-12-31 Implementation 2013-06-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A