duhhj

33 Flips | 2 Magazines | 7 Following | @duhhj | Keep up with duhhj on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “duhhj”

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NASA超音速减速器测试:采用世界最大降落伞

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