候风地动仪

Traditional (Taiwan): 候風地動儀

hòufēngdìdòngyí ㄏㄡˋ ㄈㄥ ㄉㄧˋ ㄉㄨㄥˋ ㄧˊ

    • the world's first seismograph invented by Zhang Heng 张衡 zhānghéng in 132

Character by character

Sources