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jan 1, 1086 - 【北宋】 沈括《梦溪笔谈》
Description:
#∈[1086，1093]
记载和总结了当时的许多科技成果
Added to timeline:
人教版高中历史|Chinese students' PEP SENIOR HIGH HISTORY TEXTBOOKS
By
GUZI
10 months ago
4
0
3970
Date:
jan 1, 1086
Now
~ 941 years ago
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