About: http://webisa.webdatacommons.org/48866174

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	Of course, the circulators and couplers can be replaced by other types of devices which have performance same as circulators and couplers.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com