The utility model relates to a hole enlarging drill bushing, which belongs to a processing knife tool.

本实用新型是一种扩孔钻套，属于加工刀具。

youdao

The utility model relates to a hole enlarging drill bushing, which belongs to a processing knife tool.

本实用新型是一种扩孔钻套，属于加工刀具。

youdao