A 3D printer is a type of machine that creates three-dimensional objects by depositing material layer by layer according to a digital design. 

There are several types of 3D printers available, including desktop models for personal use, industrial-grade machines for manufacturing, and even large-scale printers for construction. 3D printing has many potential applications, including creating prototypes, custom parts, medical implants, and even entire buildings. Technology has been rapidly advancing in recent years, with improvements in print quality, speed, and materials used.

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