... : remove all burrs& sharp edges,ball blasting, sand blasting.;3.Machining: cutting,CNC machining, milling, drilling, griding,punching,screwing etc.;4.Finishing:mill ... Mold tooling R&D services 2. Production services 3. Secondary machining 4.Surface treatment (Tumbling, Polishing, Tapping, Sandblasting and so on ... Better products ,Better service,Better world! punching machine processing aluminium part