1,Over 20-year experience 2,AgCdO,AgSnOInO,AgNi,AgZnO,AgCu,Cu 3,Usage:relay,switch,contactor,breaker,thermostat 4,ISO9001, ... voltage contactors, relays, automatic switch flash relays, auxiliary switch series, timers, starters, breakers and leakage protective switches. AgZnO ... is more difficult to processing these two materialsUsage:Breaker,relay,contactor,timer,thermostat,train,swithes and other home ...