About: http://webisa.webdatacommons.org/204428705

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	When the device is a mechanical device, such as a clutch or brake, the two members can be moved freely relative to one another while maintaining the gap.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk