Home / Standards / GB/T 40658-2021 GB/T 40658-2021 Active Potassium bromide optical elements 溴化钾光学元件 Standard Type GBT ICS 31.260 CCS N05 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 中国兵器工业集团公司 Drafting Unit N/A