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  1. 1
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    Safety in pneumatic drilling and related blasting operations. Opencut mine, Morenci Branch, Phelps Dodge Corp., Morenci, Ariz. / by Rodriguez, Ernest R.

    Published 1956
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    Government Document Book

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  2. 2
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    Tap drill sizes

    Published 1922
    Microfilm Book

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  3. 3
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    Noise from pneumatic rock drills : shape and exit noise of an exhaust muffler / by Chester, John W.

    Published 1964
    Government Document Book

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  4. 4
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    Sampling and exploration by means of hammer drills / by Knaebel, John B. (John Ballantine), 1906-1991

    Published 1932
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    Government Document Book

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  5. 5
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    Screw threads and tap-drill sizes.

    Published 1943
    Government Document Book

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