About: http://webisa.webdatacommons.org/8186714

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	When the cover is in its second or closed position such as shown in FIG. 4, the ring 50 engages the gasket 46 to seal the well 44 and membrane 34 from the ambient surroundings and to prevent dehydration of the membrane.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au