Spiral spread to move is depend on inside, outside the thread constitute of spiral pair to deliver sport and motive.

螺旋传动是依靠内、外螺纹组成的螺旋副来传递运动和动力。

youdao

Spiral spread to move is depend on inside, outside the thread constitute of spiral pair to deliver sport and motive.

螺旋传动是依靠内、外螺纹组成的螺旋副来传递运动和动力。

youdao