About: http://webisa.webdatacommons.org/46316862

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	Variations, including the use of a single strip of sheath material bent into tubular form around the core, are known.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com