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座標値のフーリエ解析 |
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| The Spectrum of x-coordinates of Toyama stastion in 2003 |
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| The Spectrum of y-coordinates of Toyama stastion in 2003 |
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| The Spectrum of x-coordinates of Wakkanai stastion in 2003 |
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| The Spectrum of y-coordinates of Wakkanai stastion in 2003 |