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