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How to make a sundial
How to make a sundial
Sundials are seemingly simple time-measuring instruments, but it is not an easy task to build an accurate one.
9.-12. klase
Autors: Kovács Attila
Korektors: Csányi Sándor
Grafiskais dizaineris: Molnár Mónika
Programmētājs: Gálea Patrik, Jeszenszky Anna
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