A rocket fuel injector produced by 3D printing has passed a series of tests by NASA, a first for any rocket component. The specific process used was selective laser melting, fusing metallic powders into the desired shape. "NASA recognizes that on Earth and potentially in space, additive manufacturing can be game-changing for new mission opportunities, significantly reducing production time and cost by 'printing' tools, engine parts or even entire spacecraft," said Michael Gazarik, associate NASA administrator for space technology.

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