The aerospace industry is already well advanced in using 3D printers for customparts.
航空航天工业早已开始使用3D打印机来定制配件了。
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The high cost is due to many customparts as well as the need to recover development costs.
高成本是由于许多是非标配件,已经需要涵盖研发成本。
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The do-it-yourself option recently got a boost, when researchers demonstrated the feasibility of 3-d customparts printing using raw materials available on the moon.