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GE69783.pdf (file size: 453 KB, MIME type: application/pdf)
19th century reaction engine Patent Nr. 68,783, German, Lavrenne, E., 3 June 1893
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current | 14:49, 10 June 2021 | (453 KB) | RobertG (Talk | contribs) | (19th century reaction engine Patent Nr. 68,783, German, Lavrenne, E., 3 June 1893) |
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