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N.A.C.A. Recording Air Speed Meter (1921)
NASA Technical Reports Server (NTRS) · leaf 8
PIG. 3.—THE N. A. C. A. RECORDING AIR SPEED METER. 1.—CAPSULE AND DIAPHRAGM.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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