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