About: http://webisa.webdatacommons.org/6904431

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	As the data tracks were moved closer together, thermal gradients, and tolerances imposed e.g. by the manufacturing process and materials used in construction rendered open loop stepper motor positioner systems less and less reliable.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com