X-1 Submarine, sea trial (undated).jpg
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X 1 Submarine, sea trial (undated), The US X-1 at sea, X-1
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X 1 Submarine, sea trial (undated), X-1 (submarine, 1955)
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X1潜水艦、海上試験(沈没)、海上での米国X-1、X-1
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X1潜水艦、海上試験
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minisub submarine