The parting surface should be through the center of the part, not near the upper or lower edges.

分模面应经过零件中心，而不要靠近上下边缘。

youdao

A triangle section is positioned at the center back with the remainder of the back sectioned with a diagonal-forward parting on either side.

一个三角形区段被放置在中心向后地和与在任一边上的对角线-向前的分别一起区段的背面剩余物。

youdao