About: http://webisa.webdatacommons.org/255415429

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	Helical gears, stepper positioners, sliding stages, piezoelectric actuators, and other mechanisms known to one skilled in the art may be used to provide a controlled series of positions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk