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