Home / Standards / GB/T 12082-1989 GB/T 12082-1989 Active Letter symbols for gas lasers 气体激光器文字符号 Standard Type GBT ICS 31.260 CCS L39 Status 现行 Issue Date 1989-12-29 Implementation 1990-07-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A