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Patents > CPCs : CPC B64C2700/6218 or CPC B64C33/00 & Number of diagram pages: 4-5

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stability (13) · airplane (7) · flapping (6) · frame (6) · None (5) · automatic stability (4) · wheels (4) · balance (3) · design (3) · ornithopter (3) · takeoff (2) · HTA (2) · rudder (2) · propulsion (2) · propeller (2) · whole (2) · navigation (2) · hybrid (2)
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