Obama spoke about the National Additive Manufacturing Innovation Institute, a public-private partnership established in the hard-hit manufacturing city of Youngstown, Ohio, last year to research how cutting-edge 3-D printing technology can be moved from the research phase to day-to-day use."A once-shuttered warehouse is now a state-of-the art lab where new workers are mastering the 3-D printing that has the potential to revolutionize the way we make almost everything," Obama said.The process of 3-D printing (also known by the clunkier "additive manufacturing" moniker) uses computer-created digital models to create real-world objects -- everything from simple chess pieces to more complex objects such as functioning clocks. The printers follow the shape of the model by stacking layer upon layer of material to make the objects.
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