About: http://webisa.webdatacommons.org/138394169

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 valve 36 may enable the extent of underbalanced drilling to be surface or remotely controlled depending on sensed conditions, including the upward pressure supplied by the formation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au