地动仪 (地動儀) dì dòng yí

dì dòng yí phrase seismograph
Domain: Modern Chinese 现代汉语
Notes: The world's first seismograph invented by Zhang Heng 张衡 in 132; abbreviation for 候风地动仪 (CC-CEDICT '地動儀'; Guoyu '地動儀'; Wikipedia '候風地動儀')

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候风地动仪

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