{TAIL ~ A typical laser hole} has a burr and dross at {HEAD ~ the edge} of the hole opposite the laser  
{ TAIL ~ A typical laser hole } has a burr and dross at { HEAD ~ the edge } of the hole opposite the laser
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH