... bending, milling, drilling, punching, screwing, welding, assembling, etc.3, Surface: galvanization, anodizing, painting, powder coating, chromate treatment4, Size: According ... according to customers' sample or drawing.7, Equipment: High speed stamping machine, CNC machine, Milling machine, Drilling machine ... aluminum, steel, stainless steel, brass, copper etc;3) High precision metal processing.