An apparatus for machining a workpiece to {TAIL ~ a predetermined contour} in accordance with a reference pattern comprises a cam mechanism which defines {HEAD ~ the reference pattern} 
An apparatus for machining a workpiece to { TAIL ~ a predetermined contour } in accordance with a reference pattern comprises a cam mechanism which defines { HEAD ~ the reference pattern }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD