IEC 60394-1-1972 Varnished fabrics for electrical purposes Part 1 Definitions and general requirements《电工用浸渍织物 第1部分 定义和一般要求》.pdf

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IEC TR 61241-2-2-1993 Electrical apparatus for use in the presence of combustible dust part 2 test methods section 2 method for determining the electrical resis.pdf

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