| http://www.w3.org/ns/prov#value | - This sheet could be used on its own as a back-scatterer, or could be supplemented by the additional backing of a polarizer sheet and a mirror or other reflector which conserves polarization eg aluminium paint or fibrous polystyrene or polypropylene as taught in UK Patent Serial No 1509180 (U.S. Pat. Ser.
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