Home / Standards / GB/T 12855-1991 GB/T 12855-1991 Active Application and care for small power transmitting tubes 小功率发射管的使用和维护 Standard Type GBT ICS 31.100 CCS L35 Status 现行 Issue Date 1991-04-28 Implementation 1991-12-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A