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US2024274.pdf (file size: 843 KB, MIME type: application/pdf)

Patent No. 2,024,274. "Reaction-propulsion Method and Plant"; granted to Secondo Campini, of Milan, Italy.

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current22:43, 1 April 2020 (843 KB)RobertG (Talk | contribs) (Patent No. 2,024,274. "Reaction-propulsion Method and Plant"; granted to Secondo Campini, of Milan, Italy.)

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