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1by Schiffbauer, William H.Subjects: “...Coal-mining machinery Automatic control....”
Published 1997
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2Published 1926Subjects: “...Coal-mining machinery South Africa....”
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3by Sammarco, John J.Subjects: “...Coal-mining machinery Automation....”
Published 1998
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4Published 1935Subjects: “...Coal-mining machinery Law and legislation United States....”
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5Published 2014Subjects: “...Coal-mining machinery....”
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6by Curr, JohnSubjects: “...Coal-mining machinery....”
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7Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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8Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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9Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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10Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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11Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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12Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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13Published 1935Subjects: “...Coal-mining machinery Law and legislation United States....”
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14Published 2012Subjects: “...Coal-mining machinery Safety regulations United States....”
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15by Hotchkiss, Willard E. (Willard Eugene), 1874-1956Subjects: “...Coal-mining machinery United States....”
Published 1940
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16Published 1831Subjects: “...Coal-mining machinery....”
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17Published 2011Subjects: “...Coal-mining machinery United States Safety measures....”
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18Published 2011Subjects: “...Coal-mining machinery Safety regulations United States....”
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19Published 2006Subjects: “...Coal-mining machinery United States Safety measures....”
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