About: http://webisa.webdatacommons.org/167253776

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	Central portion 27 may be in the form of an insert to be described hereinafter in detail in connection with FIG. 11, in a sealing face 28 which may be constructed of a sheet of flexible material, such as rubber.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es