in vhina

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 In ancient China there was Sunshu Ao (6th century BC), Ximen Bao (5th century BC),  Du Shi (circa 31  AD), Zhang Heng (78 - 139 AD), and Ma Jun (200 - 265 AD), while medieval China had  Su Song (1020 - 1101  AD) and Shen Kuo (1031  1095). Du Shi employed a  waterwheel to power the bellows of a blast furnace producing cast iron. Zhang Heng was the first to employ hydraulics to provide motive power in rotating an armillary sphere for  astronomical observation. 

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  • In ancient China there was Sunshu Ao (6th century BC), Ximen Bao (5th century BC), Du Shi (circa 31

    AD), Zhang Heng (78 - 139 AD), and Ma Jun (200 - 265 AD), while medieval China had Su Song (1020 - 1101

    AD) and Shen Kuo (10311095). Du Shi employed a waterwheel to power the bellows of a blast

    furnace producing cast iron. Zhang Heng was the first to employ hydraulics to provide motive power in rotating

    an armillary sphere for astronomical observation.