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