Units of measurement
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Centimeters of mercury (cmHg)
Pounds per square inch (psi)
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Centimeters of mercury (cmHg)
Centimeters of mercury (cmHg) — a unit of pressure equal to the pressure exerted by a 1-centimeter high column of mercury. Used in meteorology and some scientific measurements.
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.