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The most important types of hydraulic machinery - hydraulic turbines for transforming water power to mechanical ouput, and pumps for producing fluid pressure for many purposes - are covered in this book, which describes the features of mechanical design of various types of turbines and pumps. The structure of a hydraulic machines is decided primarily to satisfy the need of fluid flow, so hydraulic characteristics of the machines are also stressed. Manufacturing processes of turbines and pumps and their requirements are referred to in chapters on mechanical construction.