During last 40 yr progressive automatic signaling and power interlocking have characterized American signaling; more recently automatic traffic control and centralized traffic control have been introduced.


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    Titel :

    Tendencies in American signalling


    Weitere Titelangaben:

    Ry Gaz


    Erschienen in:

    Erscheinungsdatum :

    1941


    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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