About: http://webisa.webdatacommons.org/369630742

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	A return spring 21 is disposed between the block 18a and the fixed core 17b so as to urge the block in such a direction as to open the valve.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com