Assertion: circuit breaker's contact | /r/MadeOf | copper or copper metals
Facets:
Source sentences:
text: Contacts are made from copper or copper metals, silver alloys as well as other incredibly conductive items.
text: The main pair of contacts (1) carries the current at normal load and these contacts are made of copper metal.
text: Contacts are made from copper or copper metals, silver alloys as well as other incredibly conductive items.