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B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
B64C11/006—Paddle wheels
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Aviation & Aerospace Engineering
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FR554154D1922-06-231922-06-23Dispositif à transformations pour la sustentation et la propulsion d'aéroplanes par groupements symétriques
ExpiredFR554154A
(fr)