Home / Standards / GB/T 12847-1991 GB/T 12847-1991 Active Blank detail specification for hydrogen thyratrons 氢闸流管空白详细规范 (可供认证用) Standard Type GBT ICS 31.080.20 CCS L39 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