means for aiming said laser beam at said workpiece comprising {HEAD ~ a reflector} disposed between said laser and {TAIL ~ said workpiece} 
disposed between
means for aiming said laser beam at said workpiece comprising { HEAD ~ a reflector } disposed between said laser and { TAIL ~ said workpiece }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL