Such panel structures typically consist of synthetic resin, and examples are foamed or gas expanded polystyrene, and {HEAD ~ foamed or gas expanded polypropylene}, formed as molded and curved blocks or {TAIL ~ sections} that interfit end to end, as for example is shown in FIG 7, and may be adhesively bonded together at their interfit locations 
Such panel structures typically consist of synthetic resin , and examples are foamed or gas expanded polystyrene , and { HEAD ~ foamed or gas expanded polypropylene } , formed as molded and curved blocks or { TAIL ~ sections } that interfit end to end , as for example is shown in FIG 7 , and may be adhesively bonded together at their interfit locations
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