About: http://webisa.webdatacommons.org/66300970

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	Purge tube 128 is connected to a purge gas source which provides a gas such as carbon dioxide under a gentle flow, typically one to three liters per minute, to create a back pressure from lens 130 forward into handpiece 124.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com