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