Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)
Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 242
915. INTERNAL WORM-GEAR WHEEL foidriving a spur-gear pinion. … 916. WORM-GEAR PINION to drive an inter-nal spur-gear wheel.
Mechanical movements
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