About: http://webisa.webdatacommons.org/447154997

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	Both the electrical signals generated to set the distance, and the electromechanical elements used to respond to these signals, will not be perfectly stable over time and a range of environmental and other conditions.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com