#ratchet_wheel__ratchetwheel  toothed wheel held in place by a pawl or detent and turned by a lever
  supertype:  #wheel  a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
  part of:  #ratchet__rachet__ratch  mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
     part of:  #spiral_ratchet_screwdriver__ratchet_screwdriver__ratchetscrewdriver  a screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handle

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