About: http://webisa.webdatacommons.org/190199417

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	A mechanism, such as threads on the sleeve and the shaft, translates a difference in the rotational velocities of the sleeve and the shaft into linear motion of the sleeve, and thereby of the object to be moved.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com