About: http://webisa.webdatacommons.org/94952775

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	The simplest mechanical control would be a screw assembly, such as the screw shown positioned through the thickness of partial barrier 412.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca