Red Arrow Lines in Philadelphia has all relay automatic plant, including switches and crossovers in large layout; detailed description of plant.


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    Title :

    Most complicated automatic interlocking


    Additional title:

    Ry Signaling


    Contributors:

    Published in:

    Publication date :

    1945


    Size :

    4 pages


    Remarks:

    Track and signal diagram given


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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