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