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3D printer, also known as 3D Printer (3DP for short), is a process of Rapid Prototyping (RP), which uses layer by layer to produce 3D models. Its operation process is similar to that of traditional printers. It's just that traditional printers print ink onto paper to form two-dimensional plane drawings, while three-dimensional printers use photosensitive resin materials, molten plastic filaments, gypsum and other materials to achieve layers by spraying adhesives or extrusion. Layers are stacked to form a three-dimensional solid. Rapid prototyping technology (r referred to as RP), also known as rapid prototyping technology, is an advanced manufacturing technology developed in recent years. Rapid prototyping technology originated in the United States in the 1980s and quickly developed to Japan and Europe. It is a major breakthrough in the field of manufacturing technology in recent years. Rapid prototyping is a digital forming technology based on the idea of ​​discrete accumulation forming; it is the technical integration of CAD, numerical control technology, laser technology, and material science and engineering. It can automatically and quickly materialize design ideas into prototypes with certain structure and functions or directly manufacture parts, so that product designs can be quickly evaluated and modified to respond to market demands and improve the competitiveness of enterprises.