About: http://webisa.webdatacommons.org/455534302

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	Dual beam oscilloscope A dual beam oscilloscope was a type of oscilloscope once used to compare one signal with another.
http://www.w3.org/ns/prov#wasQuotedFrom	reference.com