... the mechanical hardness and the resistance against electrical wear.2.Specificationwe can offer diffierent specifications ... used in high or low-voltage electrical appliances.2>Switches,relays,circuit breakers,sensors,thermostat etc.Specifications1,Over ... Cu, etc ApplicationsLow Voltage Electrical Appliances and Households,such as Switch,Relay,KSD,Circuit Breaker,Contactor,train,protector,timer ...