Dictionary/候风地动仪

候风地动仪候風地動儀

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ㄏㄡˋ ㄈㄥㄉㄧˋ ㄉㄨㄥˋ ㄧˊ

N

1the world's first seismograph invented by Zhang Heng 张衡|张衡 in 132

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候风地动仪