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In the process of vaporization, the workpiece table and under the action of the focused laser pointer pen beam, the temperature rapidly rises to the vaporization temperature, and the material is vaporized in large quantities, and the high pressure steam is formed by supersonic outward injection. At the same time in the laser area to form a "hole", the laser beam in the hole several times to reflect the material and the absorption of laser abundance quickly increased.
http://www.kitlaser.com/purple-laser-pointers-blue-violet-laser-pen.html
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