My invention raises the center of the sanding belt and provides a section of belt that has no backing support.

我的发明引发的砂带中心，并提供了带节没有支持的支持。

youdao

My invention raises the center of the sanding belt and provides a section of belt that has no backing support.

我的发明引发的砂带中心，并提供了带节没有支持的支持。

youdao