#bar.pressure_unit  a unit of pressure equal to a million dynes per square centimeter
  supertype:  #pressure_unit  a unit measuring force per unit area
  part:  #millibar  a unit of atmospheric pressure equal to one thousandth of a bar; "atmospheric pressure at sea level is 1013 millibars"
  part:  #barye__barabsolute__microbar  the absolute unit of pressure equal to one dyne per square centimeter

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