Atmospheric pressure
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- Pressure of air enveloping the earth, averaged as 14.7 psi at sea level, or 29.92 inches of mercury as measured by a standard barometer.
Bureau of Reclamation - Cite This Source - This Definition - Absolute pressure, back pressure, Backsiphonage, Reportable discharge of oil (40 CFR 110.3), Uplift, Uplift pressure, Venturi