About: http://webisa.webdatacommons.org/441522164

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	A sealing member 25 is provided in the upper end of chamber 14 and has a peripheral circular groove 26 in which an O-ring 27 of resilient material such as synthetic rubber is provided to form a seal with the wall of the chamber 14.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com