... , smoothness, without burrs and impurites6. Material:SPCC, SGCC, Stainless Steel, Carbon Steel, Mild Steel, Aluminum, Aluminium Alloy etc.7. Applied software for specification drawings ... tons punching machines, welding machine, polish machines...Processed materialstainless steel, copper, carbon steel (according to customer's requirement)Surface treatmentHot galvanized, polishing ...