... Oxide, Silver Nickel, Silver Tin Oxide, Silver Zinc Oxide, Silver Graphite, Silver Tungsten and Tungsten Copper LONGSUN possesses decades of experience ... )Silver/Tin Oxide( AgSnO), Silver (AgZnO)Cadmium Oxide( AgCdO) Silver/Graphite (AgC) Silver Tungsten, Silver/Tungsten Carbide ( AgW, AgWC) Copper/Tungsten ...