Metal etching marking machine: 1. electro-corrosion marking, as convenient as a seal, elegant 2. less investment, low cost, affordable 3. no Burr, does not affect the accuracy of the workpiece and roughness I. characteristics 1. electro-corrosion marking, as convenient as a seal, elegant 2. less investment, low cost, affordable 3. no Burr, does not affect the accuracy of the workpiece and roughness II. 1. electric corrosion, can be printed on metal materials 2. make a film, you can print any characters or graphics