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(https=)
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선박용 개량 푸로펠러
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Propeller
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WIND TURBINE.
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Single vane pump
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Stabilizer for boats
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Oscillating fluid impeller
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舶用二重反転プロペラ
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Shulman
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Stability of a flexible helicopter rotor blade in forward flight |
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추진 시스템
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Винт потоковый
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一种曲柄叶轮机构
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二重反転プロペラ式推進装置
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Винтовой движитель
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Fast response rotor system
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Paddle-wheel with feathering-blades.
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Cheney
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Results of Preliminary Studies of a Bearingless Helicopter Rotor Concept |
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Flügelzellenpumpe
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