About: http://webisa.webdatacommons.org/309079606

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	Thus, in principle, a saturable reactor is already an amplifier, although before 20th century they were used for simple tasks, such as controlling lighting and electrical machinery as early as 1885.[4] [5][6]
http://www.w3.org/ns/prov#wasQuotedFrom	seminarprojects.com