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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Topper 28, 58 can be any material, such as metal (aluminum, steel, iron), polymeric material, ceramic, composite, wood or any other suitable material.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com