#cylinder.round_shape  a surface generated by rotating a parallel line around a fixed line
  supertype:  round_shape__roundshape  a shape that is curved and without sharp angles
  subtype:  brake_drum__brakedrum__drum  a hollow cast-iron cylinder attached to the wheel that forms part of the brakes
  subtype:  shank  cylinder forming the part of a bit by which it is held in the drill
  subtype:  bolt_shank__shank  cylinder forming the part of a bolt between the thread and the head
  subtype:  shank.cylinder__stem  cylinder forming a long narrow part of something
  subtype:  stalactite  a cylinder of calcium carbonate hanging from the roof of a limestone cave
  subtype:  stalagmite  a cylinder of calcium carbonate projecting upward from the floor of a limestone cave
  subtype:  barrel__drum  a bulging cylindrical shape; hollow with flat ends
  subtype:  tube__pipe  a hollow cylindrical shape

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