候风地动仪 hòufēngdìdòngyí Houfeng Didong Yi Definitions Defs Origin Strokes Stroke Words Sentences Sents 候风地动仪 候風地動儀 hòufēngdìdòngyí Houfeng Didong Yi The world's first seismograph, invented by the astronomer 张衡 zhānghéng in 132 AD during the Eastern Han dynasty. Cross-References Classifier 台 táiAbbreviation of 地动仪 dìdòngyí
候风地动仪 候風地動儀 hòufēngdìdòngyí Houfeng Didong Yi The world's first seismograph, invented by the astronomer 张衡 zhānghéng in 132 AD during the Eastern Han dynasty. Cross-References Classifier 台 táiAbbreviation of 地动仪 dìdòngyí
