Communications system for centralized checking in Northern Pacific freight houses; each checker in office has console with lines going to all spots in house, and circuitry is arranged so that caller in freight car can use portable loudspeaker or telephone handset when checking freight.


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    Title :

    Phones or loudspeakers used in cars


    Additional title:

    Ry Signaling Communications


    Published in:

    Publication date :

    1956


    Size :

    3 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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