Specially designed car established contour of all objects; principal piece of equipment on car is rigid templet, mounted directly over forward trucks, from which most of measurements are made; direct measuring device facilitates recording; adjustment of templet shape meets special conditions; operation of clearance car; clearances are measured in rock cuts; floodlights provided for tunnel and night work; clearance records carefully made and maintained; maintaining established clearances.


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    Title :

    How the Pennsylvania knows and maintains clearances


    Additional title:

    Ry. Eng. Maintenance


    Published in:

    Publication date :

    1928


    Size :

    6 pages


    Remarks:

    10 Figs.


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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