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