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The scope of application of two wires without cutting loops: contact head diameter/foot diameter=(1.2~1.6)/1, foot silver layer <0.5mm Advantage introduction: This process is a common three-composite process, our company has accumulated through many years of practice , When the contact head diameter/foot diameter reaches the limit ratio, the quality can still be very stable, and it is suitable for contacts with small heads and small feet with large deformation ratios.