... , rolling, stamping, mouth-narrowing/broadening, hole/bore-making, surface-grinding, mouth-broadening, mouth-shrinking, bending,sharpening,and shaping etc. ... spark machine, line cutting machine, shearing machine,etc. D. Surface treatment: Anodizing, powder coating, nickel plating, powder painting or ... system, the factory covers an area of more than two thousand square meters, with a production of more ...