Units of measurement
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Pounds per square inch (psi)
Centimeters of water (cmH2O)
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Pounds per square inch (psi)
Pound per square inch (psi) — a unit of pressure based on pounds of force applied per square inch. Primarily used in the USA and UK.
Centimeters of water (cmH2O)
Centimeters of water (cmH2O) — a unit of pressure equal to the pressure exerted by a 1-centimeter high column of water. Used for low-pressure measurements.