About: http://webisa.webdatacommons.org/405784238

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 valve seat 15 may have a variety of shapes, such as shown in FIG. 2, just so a circular interior mating surface 17 is provided.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr