Various types of circuit controlling fences and other devices developed and employed to warn of rock falls, slides, bridge failures and fires in tunnels and snow sheds; experience has shown that at points installed these devices have proved desirable, effective and justified from safety standpoint.


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    Title :

    Protective devices increase safety of operation on southern pacific


    Additional title:

    Ry Eng Maintenance


    Published in:

    Publication date :

    1940


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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