About: http://webisa.webdatacommons.org/278488596

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	Although polytetrafluoroethylene has been mentioned for low friction layers or coatings, other materials such as silicone and hydrophilic substances can be used instead of polytetrafluoroethylene if desired.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com