About: http://webisa.webdatacommons.org/8409927

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	Those skilled in the art will appreciate that the stop ring 136 can be constructed in a number of configurations and can be made from numerous materials, including metals and nonmetals, depending on the well conditions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es