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