About: http://webisa.webdatacommons.org/426419344

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	This is advantageously accomplished without the need to transfer electrical power or control signals from a stationary source to devices such as brakes or motors on the rotating ring.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es