Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 170
596. MULTIPLE RING VALVE, forfc enlarged valve area with small lift. … 597. DOUBLE-BEAT PUMP VALVE, Cor-I nish model. The upper seat is supported by across-bar, in which is fixed the guide-pin thatI carries the valve.
Mechanical movements
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