About: http://webisa.webdatacommons.org/208310144

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 plug seat 2, the housing 8, and the plug 7 may be made of drillable material such as aluminum to facilitate drilling out these components with a roller-cone rock bit if required.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com