jeffrey mining machinery

  • Dresser Industries, inc Jeffrey Mining Machinery

    Jeffrey continuous haulage systems : double bridge carriers, bridge conveyors, room conveyors : for greater flexibility, safety and ...

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  • Jeffrey Mining Machinery Company

    Jeffrey Mining Machinery Company, Columbus. 133 likes · 11 talking about this · 3 were here. Professional Service

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  • Joy Global Wikipedia

    Joy Mining Machinery (Joy) was the worlds largest producer of high productivity underground mining machinery for the extraction of coal and other bedded materials ...