About: http://webisa.webdatacommons.org/143121750

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	In the case of all the types of switches equipped with the above-mentioned snap-action springs, a metal sheet made of spring bronze or copper/beryllium alloy is used as the base material for the spring.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com