About: http://webisa.webdatacommons.org/7974354

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 sealed chamber can be filled with air or other suitable gases to provide for a reactionary spring force acting against the membrane.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com