DIN EN 60674-3-4 bis 6-1999 电工用塑料薄膜规范.第3部分:各种材料的规范.第4-6活页:电绝缘用聚酰亚胺薄膜的要求
Specification for plastic films for electrical purposes - Part 3: Specifications for individual materials; Sheets 4 to 6: Requirements for polyimide films used for electrical insulation (IEC 60674-3-4 to 6:1993); German version EN 60674-3-4 bis 6:1995