About: http://webisa.webdatacommons.org/262882293

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	A very economical feature of the present valve is the fact that it can be readily fabricated from a plastic material, material, e.g. polyvinyl chloride, including the transfer block 60.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com