While the U.S. military would like to be able to 3D print replacement parts on or near the battlefield, U.S. Army researchers say current additive manufacturing technology isn't up to the job. On the one hand, parts produced by Fused Filament Fabrication (aka FDM) aren't strong enough to endure the rigors of combat, while 3D printers that do produce high strength parts are too large and require too much power to be feasible.
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