3D printing or additive manufacturing is the construction of a three-dimensional object from a CAD model or a digital 3D model. It can be done in a variety of processes in which material is deposited, joined or solidified under computer control, with material being added together (such as plastics, liquids or powder grains being fused), typically layer by layer.

A 3D printed firearm is a firearm that is primarily produced with a 3D printer.They can be classified by the type of 3D printers used: plastic (desktop fused filament fabrication), metal (industrial selective laser melting), or both.While plastic ones are usually used as improvised firearms that evade gun control, 3D-printed metal guns are more commonly thought as a way for legitimate …

3D (or 3-D) means three-dimensional, or having three dimensions.For example, a box is three-dimensional; it is solid, and not thin like a piece of paper.It has volume, a top and bottom, left and right (), as well as a front and back.You can turn the box around to view it from another side (called a face, surface or simply side).. A dimension is measurable in inches, microns, miles, …

3D printing is a relatively new, rapidly expanding method of manufacturing that found numerous applications in healthcare, automotive, aerospace and defense industries and in many other areas. In this review, applications in medicine that are revolutionizing the way surgeries are carried out, disrupting prosthesis and implant markets as well as ...

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