About: http://webisa.webdatacommons.org/36655419

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	Rivets 18 connect the lower inner insulating housing 22 to the lower stationary housing 20 and are made of magnetically permeable material such as ferrite or steel, which serves to concentrate the magnetic field.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk