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An Instrument for Estimating Tautness of Doped Fabrics on Aircraft (1939)
NASA Technical Reports Server (NTRS) · leaf 12
N.A.C.A. Technical Note No. 729 Figs.1,2 … Figure 1.- Spring-loaded tautness meter. Figure 2.- Schematic diagram of essential details of the tautness meter.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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