About: http://webisa.webdatacommons.org/414306323

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	It became possible to manufacture the motors for those drives only after the development of especially powerful permanent magnets in the early 1980s.
http://www.w3.org/ns/prov#wasQuotedFrom	ieee.org