Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 83
242. SINGLE D, SLIDE VALVE,with double steam and exhaustports. Central steam ports openinto steam chest at the side of the > valve. … 243. GRIDIRON SLIDE VALVE, for large port area with small motion of thevalve.
Mechanical movements
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