3D printing is a rapid prototyping technology, which is based on digital model files and uses adhesive materials such as powder metal or plastic to construct objects by printing layer by layer.

3D printing is usually realized by a material printer using digital technology. It is often used in mold manufacturing, industrial design and other fields to make models, and then gradually used in the direct manufacturing of some products. Parts already printed with this technology. This technology has been applied to jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automobile, aerospace, dentistry and medical industry, education, geographic information system, civil engineering, guns and other fields.

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