Hayward's primary field of research was fluid density and flowmeters, writing a textbook on the subject.
This method is widely used to measure flow rate in the transmission of gas through pipelines, and has been used since Roman Empire times.The coefficient of discharge of Venturi meter ranges from 0.93 to 0.97.
HII manufactures defense ground support equipment including ammunition loading systems, aircraft hydraulic system testing, aircraft cabin pressure testing, power systems, environmental control systems, military trailers, high pressure gas and liquid systems, flow measuring equipment, and logistics and support services.
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