@CNN: This concrete bridge is 86 feet long, took 450 hours to build, and was created entirely by a 3D printer https://t.co/XVOHRCf4B8

January 28, 2019 / The Arbiter / CNN

@CNN: This concrete bridge is 86 feet long, took 450 hours to build, and was created entirely by a 3D printer https://t.co/XVOHRCf4B8

This concrete bridge is 86 feet long, took 450 hours to build, and was created entirely by a 3D printer https://t.co/XVOHRCf4B8

— CNN (@CNN) January 28, 2019

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