A laser subsurface engraving machine uses a computer to control laser beam to engrave patterns, text, portraits and so on inside a crystal. In comparison with conventional methods, the laser engraving has its unique superiority. First, it uses computer controlling technology and servo-control system, which has high precision and high efficiency. Second, using laser beam as its processing method, it engraves very beautiful solid patterns which are composed of many bright little points inside rock crystal; Third, the patterns engraved inside the crystal are never worn away.
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