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3D printing, also known as additive manufacturing, is a process whereby three-dimensional objects are assembled from a digital file. Advanced printers lay down one layer on top of another until the purpose has been fully assembled. 3D printing was invented in the 80s and has been used by manufacturers since the early 90s. It is heavily used in the aerospace, aviation, and automotive industries, where printers can produce prototype parts quickly for field testing and also speed up the manufacturi Visit site »