... Pressure Welding Machine, Main products include:Bi-metal Electrical Contacts: AG/Cu, FAG/Cu, AgNi/Cu, AgSnO2/Cu, AgSnO2In2O3/Cu, AgCu ... , AgZnO/Cu, AgCdO/Cu, etc.Tri-metal Electrical Contacts: AG/Cu/AG, FAG/Cu/FAG, AgNi/Cu/AgNi, AgSnO2/Cu/AgSnO2, AgSnO2In2O3 ... , and both head and foot layer. Composite layer can use AG\Au\Pd\PT and its alloy materials; Base material generally ...