从航天领域来看，无论是太空基础设施建设还是深空探测，都离不开大量金属构件。有了太空金属3D打印技术，就能够实现原位制造、快速维修，极大提升太空任务的自主性与灵活性。
McFarland didn't know what was on the 10 rusty reels he dropped off at the Library of Congress' National Audio-Visual Conservation Center in Culpeper, Va. A Library article about the discovery describes the battered, pre-World War I artifacts as having been, "shuttled around from basements to barns to garages," and that they, "could no longer be safely run through a projector," owing to their delicate condition. "The nitrate film stock had crumbled to bits on some; other strips were stuck together," the article said. It was a lab technician in Michigan who suggested McFarland contact the Library of Congress.，推荐阅读safew官方版本下载获取更多信息
Из мира БарбиНекоторым людям мало играть в куклы. Они ими становятся19 января 2018，推荐阅读91视频获取更多信息
Буйный пассажир российского самолета напугал попутчиков беспилотниками и попал под арестПассажир «России» заявил об угрозе БПЛА на рейсе в Сочи и был арестован