This machine has a lever and a pulley component. The pulley is the black wheel/knob that has a black rope running around it, and connects to the lever (headrest/gray metal bars with the attached cushion) so that when you apply effort/force to the headrest, you can indirectly move the load of the weights by moving the load on the end of the lever (which is applied by tension from the pulley's rope), which in turn moves the weights on the other side of the pulley.
Gregory Gym, weight lifting room (9/10/2013 at 10 am)
by Elizabeth Anderson
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