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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	The one-way check valves may be fashioned of flexible material such as rubber or silicone, covering a set of holes in the body 169 and secured in the middle.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com