Pneumatic marking machine: It is through the computer to control the printing needle to move according to the edited character or figure track of the computer. At the same time, the high-pressure gas hits the printing needle with high frequency, so that a permanent character or graphic composed of dense dot matrix is printed on the workpiece table. Marking specifications, beautiful appearance, easy to change values, flexible use, strong applicability, etc. Application 1. Marking of automobile and motorcycle signs and parts, such as body, frame, chassis, connecting rod, engine, cylinder, etc. Names, trademarks, etc.; 2. Marking of various mechanical parts, machine tools, and hardware products; 3. Marking of various metal pipes, gears, pumps, valves, and fasteners; 4. Steel, steel pipe, instrumentation ,Metal machinery and equipment, such as metal sign printing; 5, plastic products, leather products marking or PVC nameplate printing.