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