Basic support for multiple parallelogram unit was suitable rail truck with superstructure to carry main axis of pantograph which is made of series of parallelogram units; machines for two tunnels were designed to give scale of 1/12; establishing center line and datum level with aid of pantograph.


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    Title :

    Pantographs plot tunnel cross-sections


    Additional title:

    Commonwealth Engr


    Contributors:

    Published in:

    Publication date :

    1954


    Size :

    2 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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