Assertion: circuit breaker's contact | /r/MadeOf | copper or copper alloys
Facets:
Source sentences:
text: Contacts are made of copper or copper alloys, silver alloys and other highly conductive materials.
text: Auxiliary or arcing contacts are made of copper alloy as they are heat resistance and used to prevent from damaging the main contacts due to arcing and can be easily replaced when needed in case of wear and tear.
text: Contacts are made of copper or copper alloys, silver alloys, and other materials.