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IEC 60740-2 Ed. 1.0 b:1993
Laminations for transformers and inductors for use in telecommunication and electronic equipment - Part 2: Specification for the minimum permeabilities of laminations made of soft magnetic metallic materials
Specifies requirements for the minimum permeabilities of laminations made of silicon-iron and nickel-iron alloys as defined by the alloy classes C2, E1, E3 and E4 of IEC 60404-1.
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International Electrotechnical Commission [iec]
International Electrotechnical Commission [iec]