The arcs intersect at point 82, and the exit apertures of {TAIL ~ both cusps} are defined by the line 76 82 which lies in {HEAD ~ the plane} of reflectors 73 and 75 
The arcs intersect at point 82 , and the exit apertures of { TAIL ~ both cusps } are defined by the line 76 82 which lies in { HEAD ~ the plane } of reflectors 73 and 75
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH