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