The shield is comprised of {HEAD ~ a pair} of {TAIL ~ crescent shaped panels} joined together by heating the panels to form a concave seam 
of
The shield is comprised of { HEAD ~ a pair } of { TAIL ~ crescent shaped panels } joined together by heating the panels to form a concave seam
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH