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www.sigmaspace.com | |
网站标题: | Sigma Space Corporation | Pioneering Aerospace Technology Solutions |
网站简介: | Sigma Space Corporation | Pioneering Aerospace Technology Solutions |
网站关键字: | Sigma Space Corporation | Pioneering Aerospace Technology Solutions |
www.techbriefs.com | |
网站标题: | Home :: NASA Tech Briefs |
网站简介: | NASA Tech Briefs features exclusive reports of innovations developed by NASA and its industry partners, contractors that can be ap |
网站关键字: | NASA,,NASA,Tech,Briefs,,Design,Engineeri |
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