Further definition of the produced line of {HEAD ~ light}, or scan line, is provided by {TAIL ~ non parallel sides} which extend between the reflective surfaces 
Further definition of the produced line of { HEAD ~ light } , or scan line , is provided by { TAIL ~ non parallel sides } which extend between the reflective surfaces
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH