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Asked by Natalia Garcia from usa | May. 02, 2014 22:58
About:Han Dynasty

What did the Han Dynasty invent

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Answers (1)
Answered by John | May. 04, 2014 02:14
1 5 Reply
Paper making technique by Cai Lun
Armillary sphere and seismograph by Zhang Heng
Mafeisan (Anesthetic) by Hua Tuo
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