Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 171
600. VARIABLE COMPENSATING WEIGHTS for a hydraulic lift. The weights are picked up oneafter the other. 601. SAND AUGER.—Used on the inside of deep wellpipes with open bottom. 602. DRIVEN WELL.—A clamp stronglybolted to the well pipe on which the weightstrikes to drive the tube. A clamp and…
Mechanical movements
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