... should provide product drawing or sample. The contact material: Ag, FAg, AgNi, AgZnO, AgCuO, AgCdO, AgSnO2, AgC, AgW, AgWC, Ag/Cu, ... ,and switch series,etc. Advantage:About the welding silver contact,our company developed the semi-automatic welding technology,to be ... technology is our patent.with this technology,the welding silver contact have following advantage: 1)Green and environmental.2)High ...