About: http://webisa.webdatacommons.org/218821622

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	These particles may include lubricating materials such as graphite and PTFE (TEFLON??? PTFE) as a few specific examples.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es