... or curved surface with flatness not exceeding 3mmApplicable Scope: Motor part, Mechanical part, Machine tool, Hardware product, Valve, Pump valve, ... One Computer via USB port.Applicable scope: (1) Motor Industry: to mark Manufacturing Number and Date, Company Name ... Cylinder Sleeve, etc.(2) Mechanical Industry: to marking on Mechanical Part, Machine tool, Hardware Product, Steel Tube, Sleeve, Collar, ...