The drive system consists of AC servomotor, ball screw and rectilinear orbit etc.

本传动系统由交流伺服电机、滚珠丝杠及直线导轨等组成。

youdao

The rectilinear movement has thus become changed into a circular motion of extreme velocity, and it is now pursuing an elliptical orbit round the moon, of which it has become a true satellite.

因此，炮弹由直线运动变成高速的环形运动，现在正沿一条椭圆形轨道绕着月亮飞行，变成了一颗真正意义上的卫星。

youdao