Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 147
arings in the casing C. The equiva- 144 MECHANICAL DRAWING lent pitcii circles of the plates or pistons are rep-resented by the two chain-dotted circles of equaldiameter; and the sides of the casing are atcs ofcircles having P^ and Pg as centers. The pistonsare, therefore, always in contact with…
Mechanical drawing · Machine design
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