#atmospheric_pressure__atmosphericpressure__air_pressure__airpressure  the pressure exerted by the atmosphere
  supertype:  gas_pressure__gaspressure  the pressure exerted by a gas
  subtype:  compartment_pressure__compartmentpressure  the air pressure maintained in the air-tight compartment of an aircraft
  subtype:  barometric_pressure  atmospheric pressure as indicated by a barometer

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