About: http://webisa.webdatacommons.org/21761996

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 material therefor is preferably a cheap material, e.g., a metal, or a fluorine resin such as polypropylene (PP) or polytetrafluoroethylene (PTFE).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au