Selector-type telephone lines for railroads and street railroads; system employed on lines of narrow-gage railroad in Switzerland, allows for communication with any receiver on line with aid of only two wires without returning ground; wiring diagrams; details of equipment.


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    Title :

    Selector-type telephone lines for railroads and street railroads


    Additional title:

    Lignes telephoniques selectives pour chemins de fer et tramways electriques


    Contributors:
    Hug, M. (author)

    Published in:

    Publication date :

    1933


    Size :

    6 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    French




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