A punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom.
一种冲头、用于在中空零件中形成相对的孔的设备和方法以及由此形成的零件。
2
The apertures in which the cutting edges are formed has at least one straight edge (80) by which a punch, used in the process of forming the edge may be oriented.