... customized. 3.CNC Milling. Extruded Aluminium blade for Vertical wind turbine. 1.We can produce the aluminum ... requirement, drawing or sample. 2.Processing: Remove all burrs & sharp edges, punching,Drilling, Trimming, Cutting, CNC machining, wire- ... drawing, etc. 3.Surface Treatment: Mill finished, Polished, Sand blasting, Anodized, Powder coated, Chromating, Passivating ...