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Дата изменения: Unknown Дата индексирования: Sun Apr 10 02:58:40 2016 Кодировка: Поисковые слова: рер р р р р р р р р р р р р р |
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| Simply slide each of five plastic rulers in this device to set the date (example: 2-0-0-1-Sep) and read out the phases of the moon for that entire month on the sixth ruler. Accurate readouts to within plus/minus three hours of the correct phase over a range of 6999 BC through 10999 AD. Complete instructions include many example calculations as well as the source materials and formulas for advanced users. Inscribed for use with Julian and Gregorian calendars. Approximately 1 dia. By 9.5. |
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