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A 3D printer is a device that creates three-dimensional objects from digital models by layering materials such as plastic, resin, or metal. Using technologies like fused deposition modeling (FDM), stereolithography (SLA), or selective laser sintering (SLS), it enables rapid prototyping and customized production across various industries, from manufacturing to art. Ideal for creating intricate designs and functional parts, 3D printing is revolutionizing the way we produce and innovate.