About: http://webisa.webdatacommons.org/309231371

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 innermost layer (281) is a tubular member comprised of a polyfluorocarbon such as PTFE which preferably has been etched (as discussed above) so to provide a good bond with the adjacent polyurethane layer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca