Pic Title: "Datong calendar through rail," the compilation Related Events: 《大统历法通轨》的编纂 Related pictures: "Datong calendar through rail," the compilation Source: http://img1.itiexue.net/ Pic Description: 　　Ming's something absolutely dry matter - the second page - Chinese history - Jagged community merchants sell this picture is the cat's tail evidence of money, but compared to other pictures, find pictures of the same period. Translated by Google No. / 2 Picture

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