Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 364
umping and returns itto the horizontal position by the meremovement of a valve. 1464. LEWIS WEDGE, for lifting stone. Acentral taper wedge, with eye and ring at thesmall end. A taper wedge is inserted in a re-verse position on each side of the double-taperwedge, so that the outside of the…
Mechanical movements
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