Zhang Heng was also a mechanical engineer, and made a flying "wooden eagle"and a "mileage-counting drum-cart".

张衡又是一位机械工程师，制造过能飞的“木雕”和能计算里程的“计里鼓车”等。

youdao

Zhang Heng was also a mechanical engineer, and made a flying "wooden eagle"and a "mileage-counting drum-cart".

张衡又是一位机械工程师，制造过能飞的“木雕”和能计算里程的“计里鼓车”等。

youdao