#cam_stroke__camstroke__throw__stroke  the maximum movement available to a pivoted or reciprocating piece by a cam
  supertype:  #movement__motion  a natural event that involves a change in the position or location of something
  subtype:  #instroke  the stroke of an engine piston moving away from the crankshaft
  subtype:  #outstroke  the stroke of an engine piston moving toward the crankshaft

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