这里所用的滚轴的滚珠数量是非固定的，他取决于弯曲的角度。

The mandrel used here is flexible with a number of balls and with its front end put far foard in the bend.

youdao

这里所用的滚轴的滚珠数量是非固定的，他取决于弯曲的角度。

The mandrel used here is flexible with a number of balls and with its front end put far foard in the bend.

youdao