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