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Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

Aircraft lift principle demonstrator model junior high school physics experiment equipment teaching instrument for students

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