... seat, spring, connector, socket, bushing, push-button, etc.Surface Finishannealing, natural anodization, heat treatment, polishing, nickel ... plating, yellow passivation, gold passivation, galvanizing, satin, etc.Processing Methodcnc machining, turning, milling, drilling, grinding, ... of national standard and non-national standard. Apply to electrical appliances, electronic products, medical equipment, ...