然后，从圆的外边缘到内孔剪一个口，如图所示。

Next, cut from the outside edge of the circle to the inner circle, as shown.

youdao

然后，从圆的外边缘到内孔剪一个口，如图所示。

Next, cut from the outside edge of the circle to the inner circle, as shown.

youdao