{HEAD ~ Still additional protection} can be provided for user 20 by moving {TAIL ~ flap} 22 from an uncovered configuration, as shown in FIG 2, to a covered configuration, as shown in FIG 1 
provided by moving
{ HEAD ~ Still additional protection } can be provided for user 20 by moving { TAIL ~ flap } 22 from an uncovered configuration , as shown in FIG 2 , to a covered configuration , as shown in FIG 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH