Copper-aluminum transition nose, one of the specifications of copper-aluminum lug. It is made of copper and aluminum, which is an international standard. It is mainly suitable for the transition connection between various circular and semi-circular fan-shaped aluminum wires in power distribution devices and copper terminals of power cables and electrical equipment. L3 aluminum and T2 copper are used for the transition connection between the aluminum core cable of the power distribution device and the copper terminal of the electrical equipment. The product is manufactured by friction welding process, which has the characteristics of high welding strength, good electrification performance, electrochemical corrosion resistance and long service life.