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B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
B64C11/30—Blade pitch-changing mechanisms
B64C11/306—Blade pitch-changing mechanisms specially adapted for contrarotating propellers
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CH253393D1941-08-201946-08-01Dispositif pour la commande simultanée du changement de pas de deux hélices coaxiales tournant en sens inverse.
CH253393A
(fr)