GB/T 19264.
Specification for pressboard and thin pressboard for electrical purposes — Part 3: Specifications for individual materials — Sheet 1: For B.0.1, B.2.1, B.2.3, B.3.1, B.3.3, B.4.1, B.4.3, B.5.1, B.6.1 and B.7.1
电工用压纸板和薄纸板规范 第3部分:单项材料规范 第1篇:对B.0.1,B.2.1,B.2.3,B.3.1,B.3.3,B.4.1,B.4.3,B.5.1,B.6.1及B.7.1