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