#discharge_pipe__dischargepipe  a pipe through which fluids can be discharged
  supertype:  #pipe__pipage__piping  a long tube made of metal or plastic that is used to carry water or oil or gas etc.
  subtype:  #hydrant  a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks
     subtype:  #fireplug__fire_hydrant__plug  an upright hydrant for drawing water to use in fighting a fire

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