The laser light beam is not only coherent but also has high energy content. When
it is focused on the surface, the laser light
creates heat used for welding,
drilling, and cutting. The laser beam and the work piece is manipulated through the use of robotics. It can be adjusted to different sizes and heat intensity. The smaller
laser is used for drilling, cutting, and welding while the larger machines are used in off giving heat" -- Reference http://ezinearticles.com/?Laser-Cutting-Tools&id=352889
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