The seismograph invented in 132 a.d. by zhang heng , chinese scientist of the east han dynasty ( 25 a.d.-220 a.d. ) , was the first seismograph in the world . 中国东汉科学家张衡于公元132年发明的地动仪是世界上最早的地震仪。
Wave form display type shallow - layer seismograph 波形表示型浅层地震仪
Signal enhancement shallowlayer seismograph 信息增强型浅层地震仪
The data statistics of national digital seismograph network 国家数字地震台网产出资料的分析与说明
General technical condition of rayleigh wave seismograph for mining 矿用瑞利波探测仪.通用技术条件
Cathode - ray tube refraction seismograph 阴极射线管折射地震仪
The seismograph showed a sharp spike in response to the trembler 地震仪显示，震动器的反应突然大增。
Expanding capacity of acquisition channels of r24 shallow seismograph 24浅层地震仪器采集道能力的扩展
