Как определить какой драгметалл в реле РЭС9 без кислот и если затёрт паспорт

This video presents the simplest, fastest, and 100% reliable method for identifying contacts in a RES9 relay. This method includes identifying the precious metal they are made of (platinum, gold, or silver), without acid, even if the registration document is worn, unclear, or relabeled, as well as if the relay has burned out and the registration document is not visible. Experienced professionals who have worked with precious metals for a long time can determine this by sight. VK group: https://m.vk.com/dmetalltv?from=groups