．Agcdo AgNi material with 10-40% of high melting-point metal nickel has high electric conductivity, low contact resistance and little burning loss. This material has little transfer when connecting and breaking direct current. To be widely used in AC and DC low-voltage devices, such as relays, instruction switches, can switches, breaker, assisting contactors. Instrument switches, optical control switches, temperature controller and washing machine timers, etc.