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Curves showing column strength of steel and duralumin tubing (1929)
NASA Technical Reports Server (NTRS) · leaf 19
Fig. 9 N.A. C.A. Technical Note No. 30S ISO 200 10 ZO 30 40 50 60 70 80 90 100 110 120 130 MO Length of.tube in inchesNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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