Hydraulically-powered legs mounted on crawlers and carrying sections of conveyors provide roof support close to working face and above workspace at all times.


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    Title :

    Roof Support Near Coal-Mining Face


    Contributors:
    Knurovsky, T. (author) / Kiskis, J. P. (author) / Siegel, G. (author)

    Published in:

    Publication date :

    1984-04-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


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