#condenser.apparatus  an apparatus that converts vapor into liquid
  supertype:  #apparatus.equipment__apparatu__setup  equipment designed to serve a specific function
  part of:  #still.apparatus
  subtype:  #Liebig_condenser  a condenser: during distillation the vapor passes through a tube that is cooled by water
  subtype:  #reflux_condenser  condenser such that vapor over a boiling liquid is condensed and flows back into the vessel to prevent its contents from boiling dry

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