About: http://webisa.webdatacommons.org/413227072

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	Sensors (eg. limit switches, proximity switches, light beams/photocells) (see FIG. 1) can be provided to ensure that a rivet or other fastener is provided in the delivery passage before the punch is advanced.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com