About: http://webisa.webdatacommons.org/127081982

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	Alternatively, coupling means in the form of other types of spring contacts, fine wire brushes or other known mechanisms for rotatable electrical couplings may be substituted.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk