... 3. Utility: machinery, autos, equipments.4.Surface treatments:deburr,polishing,sandblasting,nickel plating,chrome plating,oxidation,plastic,spray-paint,ect ... , griding,punching,screwing etc.;4.Finishing:mill finish,electrophoresis,polishing,plating,anodizing,painting,powder5.Packing: Plastic film and kraft ... work Better products ,Better service,Better world! punching machine processing aluminium part