In this Wednesday, Oct. 9, 2019 photo provided by the University of Maine, a 25-foot, 5,000-pound patrol boat, center, that was produced using a large polymer 3D printer, behind left, rests on a trailer on the school's campus, in Orono, Maine. The boat was printed at the school's Composites Center on the world's largest polymer 3D printer. (Ron Lisnet/University of Maine via AP)
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