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마리안은 먼저 지구의 자전축에 주목했다. 지구의 자전축은 궤도면에 비해 23.5도 ...
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헬기용 동력전달장치는 비행에 요구되는 고출력의 동력을 엔진의 고속회전축에서 주로터 및 꼬리로터로 전달하는 장치다....
biz.heraldcorp.com
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