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Patents > Inventor country: RO & Citations from after 1930: None & Number of text pages: 3-11

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airplane (14) · design (12) · wings (11) · propellers (10) · construction (9) · aerodynamics (7) · frame (6) · control (5) · fuselage (5) · stability (4) · steering (3) · landing (3) · heavier-than-air (3)
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