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Patents > Inventor country : RO or SE & Number of text pages: 2-3

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airplane (12) · Wings (11) · Propulsion (10) · Flapping (9) · frame (9) · Construction (8) · aerodynamics (7) · Design (6) · marine (4) · Propellers (4) · stability (4) · heavier-than-air (3) · propeller (3) · None (3) · Lift (3) · navigation (3) · wing (3) · LTA (3)
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