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The steam-engine and other heat-motors (1909)
Creighton, William Henry Paul, 1859- · New York, J. Wiley & sons; [etc., etc.] · leaf 391
Fig. 199. Fig. 200. Poppet-valves.—Slide-valves give much more trouble thanpistons whrn steam is ueed that has been superheated to suchSteam-engines · Heat-engines
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