About: http://webisa.webdatacommons.org/401568479

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 first lubrication layer 18 a is formed of such a material as fluororesin, silicone resin or polyvinyl chloride.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com