About: http://webisa.webdatacommons.org/342856458

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	If the eccentric mass is made of a metal such as iron or steel, the force between magnet and mass are attractive.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es