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Since inventing 3D printers, they were used for printing almost everything, from accessories and jewelry to organs and prosthetic. Now, a Dutch company based in Amsterdam called MX3D, developed a project that includes printing a bridge. The idea is to print the bridge with their robotic 3D printers without any physical assistance.
Source: https://m.phys.org/news/2015-06-hype-3d-bridge-future.html