About: http://webisa.webdatacommons.org/24471655

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	Further, the bar-like members can be made of materials other than metal, such as relatively hard plastics, to further reduce rusting problems.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com