#roll.cylinder  anything rolled up in cylindrical form
  supertype:  #cylinder.solid  a solid bounded by a cylindrical surface and two parallel planes (the bases)
  subtype:  #bolt.roll  a roll of cloth or wallpaper of a definite length
  subtype:  #rouleau  a roll of coins wrapped in paper
  subtype:  #rouleau.roll  a roll of ribbon

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