Bullock Diamond Drill underground

Bullock Diamond Drill underground set for a 45 degrees downward hole from the Article Prospecting with the Diamond Drill by J. Parke Channing from The Engineering Magazine DEVOTED TO INDUSTRIAL PROGRESS Volume X October 1896 NEW YORK The Engineering Magazine Co

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Image Size: 1647x2883 / 3.1MB; diamond drill drilling mine mining prospect prospecting shanty surface drills miner miners excavation BULLOCK underground dig digging hydraulic Engineering technology technological industry resource resources 19th century Nineteenth Century history historic development historical 1890s the past tool tools innovation innovative economical mechanics mechanic mechanical apparatus machinery advancement power steam design Machine machines psi idr
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Bullock Diamond Drill underground set for a 45 degrees downward hole from the Article Prospecting with the Diamond Drill by J. Parke Channing from The Engineering Magazine DEVOTED TO INDUSTRIAL PROGRESS Volume X October 1896 NEW YORK The Engineering Magazine Co