{HEAD ~ Each} of the light incidence end and {TAIL ~ the light emitting end} of the mirror light guide component is either an opening or a transparent layer 
of
{ HEAD ~ Each } of the light incidence end and { TAIL ~ the light emitting end } of the mirror light guide component is either an opening or a transparent layer
HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH