Simple machines

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Across
  1. 3. inclined plane wrapped around a cylinder
  2. 5. type of an inclined plane
  3. 6. wheel and axle on a cable
Down
  1. 1. and axle- a circular piece rotating on an axle
  2. 2. plane a flat surface tilted at an angle
  3. 4. rod or a beam that pivots on a fulcrum