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Zhang Heng (78-139) - 张衡 - Chinese Astronomy - 中国天文学
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日期:2024-05-14
The seismometer (候風地動儀 hòufēng dìdòng yí) that Zhang Heng invented in 132 AD was an urn with some type of pendulum apparatus contained within it. We don't know the exact mechanics because they were lost in history. The pendulum was extremely ......看更多