Literates: Zhang Heng & Dukang в Android Market

Literates: Zhang Heng & Dukang (v. 2.1) Разработано EZTakes

Zhang Heng, also known as Zhang Pingzi, was a great astrologer in the Eastern Han Dynasty. He created the first armillary sphere that could predict astronomical phenomena relatively accurately. At the same time, he created the first machine to measure the...more at www.eztakes.com. (Duration: 50 minutes)