{HEAD ~ The second material} for the outer core, preferably polyurethane foam, consists of {TAIL ~ 100 parts} of a resin mixture, a blowing agent, and either 51 or 60 parts isocyanate 
consists of
{ HEAD ~ The second material } for the outer core , preferably polyurethane foam , consists of { TAIL ~ 100 parts } of a resin mixture , a blowing agent , and either 51 or 60 parts isocyanate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH