International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 450
Fig. 307. g great depths to the earths surface; hence, g a very long piston rod is necessary. In the S lifting pump shown in Fig. 206 the water is raised from a point a few feet below the PNEUMATICS. 439 earths surface to a point considerably higher. This re-quires the piston rod to move through a…
Railroad engineering
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