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