About: http://webisa.webdatacommons.org/226483750

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	With reference to FIG. 2, the annular member 22 has a ring 30 of a first material 31, and an outer sheet 32 of a biologically inert material, such as silicone, covering the outer surface of the ring 30.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr