About: http://webisa.webdatacommons.org/397549545

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	The switching elements (Th1), (Th2), and (Th3) may be semiconductor switching elements such as thyristors, power transistors and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk