It is expected that Lunar and Martian explorers will build tools and parts as needed while traveling or using local resources. NASA scientists are interested in testing electron beam freeform fabrication EBF3 on the International Space Station. Such a device could build certified aerospace parts cheaper and using less material than conventional manufacturing methods.
in reference to: http://www.space.com/businesstechnology/091104-tw-3d-replicator.html (view on Google Sidewiki)
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