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The Denis-gruson Six-component Wind-tunnel Balance (1935)
NASA Technical Reports Server (NTRS) · leaf 10
N.A«C,A. Technical Memorandum No. 772 Tigs* 5 Figtire 5.- The 6.C#1# "balance*NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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