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 . 中國東漢科學(xué)家張衡于公元132年發(fā)明的地動儀是世界上最早的地震儀。
The celestial globe invented by zhang heng , chinese scientist of the east han dynasty ( 25 a.d . - 220 a.d. ) , was the first of its kind in the world. it determined that the angular diameter of both the sun and the moon was 0.5 . 中國東漢科學(xué)家張衡發(fā)明的天球儀是世界上最早的天球儀。
Please talk to zhang heng for more information 想了解更多的信息,請聯(lián)系張恒。
Zhang heng ' s rhapsodies and the course of his motives 張衡賦作與其心路歷程
Please talk to zhang heng for more information 請找張恒了解更多的信息。