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Torsional Strength of Nickel Steel and Duralumin Tubing as Affected by the Ratio of Diameter to Gage Thickness (1924)
NASA Technical Reports Server (NTRS) · leaf 19
Fig. 13 Gage Diam. No. .057" 3/^" Gl .057" 3A" G2 Twist in degrees Duralumin tubing Fig. 13NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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