IEC 60674-3-4 to 6:1993
电工用塑料薄膜规范 第3部分:单项材料规范 活页4-6:对电气绝缘用聚酰亚胺薄膜要求
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