公元132年，张衡在京城洛阳制成了可以测定地震方向的“候风地动仪”。
In 132 AD, in the then national capital of Luoyang, Zhang Heng made the ancient seismograph to determine the direction of an earthquake.
公元132年，张衡在京城洛阳制成了可以测定地震方向的“候风地动仪”。
In 132 AD, in the then national capital of Luoyang, Zhang Heng made the ancient seismograph to determine the direction of an earthquake.
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