About: http://webisa.webdatacommons.org/303857616

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 inside surface can be continuous as illustrated or some other sealing structure such as one or more inwardly projecting rings which provide a seal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com