The impact surface is vibrated in {HEAD ~ the clearance} between {TAIL ~ the tool} and the profile of the workpiece, so as to de burr the latter 
between
The impact surface is vibrated in { HEAD ~ the clearance } between { TAIL ~ the tool } and the profile of the workpiece , so as to de burr the latter
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH