1,amplifier plate, amplifer panel . 2,extrusion aluminium CNC machining 3 ... panel, aluminium alloy panel, metal panel for electric appliance,car amplifier plate, amplifer panel, aluminium amplifer panel.aluminium hardware. Material; ... deep processing ( punching / stamping, milling, taping, CNC machining, polishing.)6,surface treatment (wire drawing, deburring, anodizing, powder coating, baking varnish ...