A gantry assembly is mounted in close proximity to such work surface, and facilitates movement of {HEAD ~ a focused laser assembly} to {TAIL ~ any x/y coordinate} along the work surface 
to
A gantry assembly is mounted in close proximity to such work surface , and facilitates movement of { HEAD ~ a focused laser assembly } to { TAIL ~ any x / y coordinate } along the work surface
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH