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Sejong succeeded to the throne from King Taejong in August 1418.

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Sejong succeeded to the throne from King Taejong in August 1418.

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King Sejong wrote Nongsa Jikseol in 1429.

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King Sejong wrote Nongsa Jikseol in 1429.

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Jang Young-sil made 'Jagyeongru' in 1434.

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Jang Young-sil made 'Jagyeongru' in 1434.

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Jang Young sil made 'Angbuilgu' in 1434.

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Jang Young sil made 'Angbuilgu' in 1434.

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Jang Yeongsil invented  sundial in 1434.

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Jang Yeongsil invented  sundial in 1434.

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Jang Yeongsil invented measuring in 1442

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Jang Yeongsil invented measuring in 1442

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Yi sunsin1592~1599

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Yi Sun-shin conquered the Japanese army in 1598

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Yi Sun-shin conquered the Japanese army in 1598

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Heo Jun wrote the book 'Dong-uibogam' in 1610.

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Heo Jun wrote the book 'Dong-uibogam' in 1610.

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Jeong Yakyong designed a heavy machine in 1780.

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Jeong Yakyong designed a heavy machine in 1780.

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gim hongdo drew the picture '규장각도' in 1776

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gim hongdo drew the picture '규장각도' in 1776

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Gim Jeongho made the map 'Daedong-yeojido' in 1861.

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Gim Jeongho made the map 'Daedong-yeojido' in 1861.