#water_mill__watermill  a mill powered by a water wheel
  supertype:  #mill__grinder  machine that processes materials by grinding or crushing
  part:  #millwheel  water wheel that is used to drive machinery in a mill
     part:  #paddle.blade  a blade of a paddle wheel or water wheel
  part:  #waterwheel__water_wheel__waterwheel  a wheel that rotates by direct action of water; a simple turbine
     part:  #bucket__pail  a roughly cylindrical that is vessel open at the top

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