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Patents > CPCs : CPC B64C3/18 or CPC B64C33/02 & Number of figures: 3

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flapping (12) · None (11) · Propulsion (7) · Airplane (5) · construction (5) · ornithopter (5) · wings (4) · frame (4) · rudder (4) · marine (2) · valve (2) · Control (2) · design (2) · propeller (2)
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