File:1917-Rosenzweig-p36.jpeg

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current20:44, 6 February 2024Thumbnail for version as of 20:44, 6 February 2024730 × 1,404 (161 KB)LTA (talk | contribs)Propeller patents in Rosenzweig, 1917, Systematic collection of patents issued in Russia, p. 36. (VPTB.)

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