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