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Date: 2013-07-15 11:16:50Steel Friction stir welding Gas tungsten arc welding Shielding gas Space Shuttle external tank William Arbegast Friction stud welding Welding Mechanical engineering Arc welding | Friction Stir Welding.PDFAdd to Reading ListSource URL: www.nasa.govDownload Document from Source WebsiteFile Size: 878,42 KBShare Document on Facebook |