... marking (4) Optional Marking Mode: Line Marking or Dot Marking (5) Optional Connection Mode: USB port or Serial port ... Cylinder, Piston, Cylinder Sleeve, etc.(2) Mechanical Industry: to marking on Mechanical Part, Machine tool, Hardware Product, Steel Tube, Sleeve ... , etc.(3) To mark on Apparatus, Elector-mechanical instrument.(4) To mark on Plastic and Leather product. (5) To mark Manufacturing Number ...