There are many makes and models of flow meters available today, and while there are many similarities there can be difference in the cost and features, which makes choosing flow meters
for a particular application somewhat difficult. An often used flow meter is the ultrasonic flow meter, which is often chosen primarily because it is inexpensive, readily portable and easy to install, but its not a one size fits all situation.
Water quality standards: progress and problems of implementation
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||Am J Public Health Nations Health 1968/02/01
||Lyon, W. A.
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