... surface of Cu. Al.2) Noise reduction, shocking proof, soundproof with the adhesive resin in the middle.3) Easy processing, ... Keep the external stamp of AL plates, corrosion resistance, shocking proof, soundproof, heat resistance, cost down, could make kinds of ... Keep the external stamp of Stainless steel, corrosion resistance, shocking proof, soundproof, heat resistance, cost down, could make kinds of ...