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  1. MOST RECENT

    2233951

    NEMA SB 50-2021▹

    Emergency Communications Audio Intelligibility Applications Guide

    standard by National Electrical Manufacturers Association, 2021.

    Languages: English

    Historical Editions: NEMA SB 50-2014, NEMA SB 50-2008

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  2. MOST RECENT

    2233952

    NEMA SB 50-2021 Spanish▹

    Guía de aplicaciones de inteligibilidad de audio para comunicaciones de emergencia

    standard by National Electrical Manufacturers Association, 2021.

    Languages: Spanish

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