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High-speed Oil Engines for Vehicles. Part II (1927)
NASA Technical Reports Server (NTRS) · leaf 52
N.A.C.A* Technical Memorandum No.403 Plate I Plate I (Air injection). Compression pressure,30 atm.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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