a sheet of non reinforced thermoplastic material superposedly attached to {TAIL ~ said sheet} of {HEAD ~ fiber} reinforced thermoplastic material, wherein both of said sheets are jointly deformed substantially differently along different axes to form a cavity and wherein said sheet of fiber reinforced thermoplastic has a thickness which varies over said cavity, the thickness of the fiber reinforced thermoplastic being substantially thinner over said cavity than elsewhere 
a sheet of non reinforced thermoplastic material superposedly attached to { TAIL ~ said sheet } of { HEAD ~ fiber } reinforced thermoplastic material , wherein both of said sheets are jointly deformed substantially differently along different axes to form a cavity and wherein said sheet of fiber reinforced thermoplastic has a thickness which varies over said cavity , the thickness of the fiber reinforced thermoplastic being substantially thinner over said cavity than elsewhere
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH