#fairlead  a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing
  supertype:  pulley-block__pulley__block  a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
  subtype:  snatch_block  a pulley-block that can be opened to receive the bight of a rope

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