WMAP Scanning Geometry 990031b.jpg
NASA
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WMAP Scanning Geometry 990031b, WMAP
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WMAP Scanning Geometry 990031b, WMAP spacecraft Scanning Geometry
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走査幾何学 990031b, WMAP
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WMAP 走査幾何学 990031b、WMAP宇宙船 走査幾何学
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projective geometry geometry elementary geometry scanning