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Feild's Open Channel Flow Calculator - Perrygraf 1950

A very useful and complicated calculator that I lived on for years early in my career. Extremely versatile

 

And - yes - correct name is Feild's the last name of the inventor

 

Still available today - if you need one - let me know - I can tell you where

 

 

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Uploaded on April 11, 2019
Taken on April 10, 2019