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您輸入的關鍵字: United States Naval Observatory
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外文書
United States Naval Observatory
Nautical Almanac Office United States Naval Observatory (COR)
Nautical Almanac Office (CON)/ United States Naval Observatory (CON)/ Her Majesty’s Nautical Almanac Office (CON)
United States Naval Observatory (COR)
Great Britain Hydrographic Office (COR)/ United States Naval Observatory (COR)