{HEAD ~ The laser} 10 includes {TAIL ~ a beam delivery assembly} with a cylindrical housing 12 terminated in a conical end having a circular opening 13 
includes
{ HEAD ~ The laser } 10 includes { TAIL ~ a beam delivery assembly } with a cylindrical housing 12 terminated in a conical end having a circular opening 13
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH