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Single vane pump
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ピッチ自動可変プロペラ
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一种曲柄叶轮机构
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Compressibility effects on the unsteady aerodynamics of a rotor in hover or axial flight |
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A drive
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二重反転プロペラ式推進装置
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Improvement in propellers for vessels |
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Fast response rotor system
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