GB/T 17564.4-2001
电气元器件的标准数据元素类型和相关分类模式 第4部分;IEC标准数据元素类型、元器件类别和项的基准集
Standard data element types with associated classification scheme for electric components--Part 4: IEC reference collection of standard data element types,component classes and terms
GBT17564.4-2001, GB17564.4-2001