About: http://webisa.webdatacommons.org/259578773

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	is type can be used to drive units such as oil pumps, where, for space reasons, the center section is thinner than the toothed ends.One proposed method to produce such shafts was to form them as a single part using cold extrusion.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com