About: http://webisa.webdatacommons.org/218930470

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	Therefore, the apparatus can test many kinds of circuit boards, for example, a large and expensive circuit board, by changing the frequency and/or output power of the electromagnetic (radio) wave signal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr