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[国外标准] IEC 61156-1-4-2018 Multicore and symmetrical pair/quad cables for digital communications Part 1-4

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P:2023-12-03 13:55:42

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IEC 61156-1-4-2018~~~~~~~~~POE.pdf

IEC 61156-1-4-2018 Multicore and symmetrical pair/quad cables for digital communications Part 1-4.pdf

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