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Patents > Inventor country : BE or HU & Number of diagram pages: 3-6000000

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airplane (11) · propulsion (10) · propellers (8) · LTA (5) · Flapping (4) · design (4) · wings (3) · Steering (3) · airship (3) · stability (3) · rarefaction (3) · construction (3) · navigation (3) · whole (2) · rudder (2) · Helicopter (2) · compartments (2) · automatic stability (2) · Dirigibles (2)
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