Mechanical movements, powers, devices and appliances (1901)
Hiscox, Gardner Dexter, 1822?-1908 · New York, N. W. Henley & company · leaf 308
1204. LINK CHAIN CUTTER, used incoal-cutting machines. … 1205. DRILL FOR CURVEDHOLES, used in coal mining. Thedrill is on the end of a curved tube, andis driven by a flexible shaft. The tubeis fed forward by a pivoted arm andworm gear.
Mechanical movements
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