This invention relates to apparatus for machining workpieces to {HEAD ~ a predetermined contour} in {TAIL ~ accordance} with a reference pattern 
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This invention relates to apparatus for machining workpieces to { HEAD ~ a predetermined contour } in { TAIL ~ accordance } with a reference pattern
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH