{HEAD ~ The sheet} 24 may either be {TAIL ~ a plain thermoplastic material} or a thermoplastic material reinforced with fibers 
{ HEAD ~ The sheet } 24 may either be { TAIL ~ a plain thermoplastic material } or a thermoplastic material reinforced with fibers
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH