... , punching, drilling, milling, grinding, rolling, stamping, deep drawing, bending, welding, etcSurface treatmentPolishing, zinc plating, powder ... and design.Production steps Parameter Table ClassificationSteel metal partProductDescriptionPlace of Origin: Shanghai, China (Mainland ... punching, drilling, milling, grinding, rolling, stamping, deep drawing, bending,etc.Surface: Zinc plating, enamel, hot ...