<http://webisa.webdatacommons.org/366711985>	<http://www.w3.org/ns/prov#value>	"In one exemplary embodiment, an internal surface of the elements 10, 20 comprise a low-friction or lubricious material, such as an ultra-high molecular weight material or PTFE (e.g., Teflon???)." .
<http://webisa.webdatacommons.org/366711985>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/prov/459431006>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/366711985> .
<http://webisa.webdatacommons.org/366711985>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .