About: http://webisa.webdatacommons.org/109553548

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	Each of these well tools is an example of a dynamic well tool in which sealing integrity must often be maintained between two axially shiftable tubular members.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com