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 166
^mMm 595. MULTIPLE BALL VALVE.—The cone-valve seat is in two parts ; the cover or cage is heldin place by the screw in the cap. … 596. MULTIPLE RING VALVE, for k enlarged valve area with small lift. i
Mechanical movements
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