English: Fig. 4 from essay/book on centrifugal pumps by John Richards, 1894, showing a theoretical but not so great shape for the volute casing. [1]
Date
Source
Centrifugal pumps: an essay on their construction and operation, and some account of the origin and development in this and other countries
Author
John Richards
Licensing
Public domainPublic domainfalsefalse
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