云母基绝缘材料规范。第3部分：单项材料规范。第1活页：换向器隔板和材料。
Specification for insulating materials based on mica. Part 3: Specifications for individual materials. Sheet 1: Commutator separators and materials.
云母基绝缘材料规范。第3部分：单项材料规范。第1活页：换向器隔板和材料。
Specification for insulating materials based on mica. Part 3: Specifications for individual materials. Sheet 1: Commutator separators and materials.
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