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Wind Tunnel of Zeppelin Airship Company (1923)
NASA Technical Reports Server (NTRS) · leaf 21
Fig. 3. To entrance U X cone r ' T /t^J O tnr o t From -wate^ i tank y ii r To waste pipe Fis,NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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