Hutton, Frederick Remsen, 1853- [from old catalog] · New York, J. Wiley & sons; [etc., etc.] · leaf 233
^ … Fig. 163. hand. A favorite form for such piston-valves is rectangularor square instead of round. Round pistons are easier tamake and to pack. 104. Pressure-plate Systems.—The pressure-plate sys-tem aims to secure the release of the valve from unbalancedsteam-pressure by receiving that pressure on a…
Mechanical engineering · Steam power plants
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