#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
  supertype:  #simple_machine__machine  a device for overcoming resistance at one point by applying force at some other point
  subtype:  #bollock  #fairlead  #idle_pulley
  part of:  #block_and_tackle__blockandtackle  pulley blocks with associated rope or cable

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