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