... :20 Product Name: cast iron auto exhaust pipe castingsMaterials: grey iron, ductile iron, malleable iron,heat resistant iron, carbon steel, stainless ... Main production equipments: Wax injection, CNC-machine, machine-center, Heat treatment Furnace 1) We can do different ... used): numerical control lathe, vertical type CNC machining center, boring machine, universal miller, standing miller, vertical ...