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3“... the Joseon dynasty. The Small Simplified Armillary Sphere (小簡儀, So-ganui) and the Sun-and-Stars Time...”
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4“... correspond to outer layer is similar to his own Tongcheonui (armillary sphere) which is a kind of armillary...”
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5“... model of the astronomical armillary sphere system of the his armillary clock, which system is consisted...”
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6“... of the water-hammering type Honsang. A Honui (armillary sphere) and Honsang using the water-hammering method...”
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