Home / Standards / GB/T 12993-1991 GB/T 12993-1991 Active Thermal performances evaluation for electronic equipment 电子设备热性能评定 Standard Type GBT ICS 31.220 CCS L05 Status 现行 Issue Date 1991-09-18 Implementation 1992-04-01 Responsible Dept 工业和信息化部（电子） Drafting Unit N/A