The shield includes a plurality of {HEAD ~ openings} in {TAIL ~ communication} with the oxidant conduit 
in
The shield includes a plurality of { HEAD ~ openings } in { TAIL ~ communication } with the oxidant conduit
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH