Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 258
de of both disks so as to beupwards upon the lower and downwards upon the upper.It will be apparent, therefore, that valves so constructed canbe made either perfectly balanced, underbalanced, or over-balanced, according to the area and the direction of thepressure. They are most frequently slightly…
Mechanical engineering · Steam power plants
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