Hutton, Frederick Remsen, 1853-1918 · New York, J. Wiley & sons; London, Chapman & Hall, limited · leaf 258
Fig. 170. This means that the small base of the cone in the upper seatshall be just larger than the large base of the disk whichcloses the opening in the lower seat. Balanced lifting-valvesof this class open a comparatively large area for the passageof steam, and have no friction except that of the…
Mechanical engineering · Steam power plants
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