hand hollow punch 手动空心冲头
hollow punch set 皮带冲
hollow center punch 套筒中心冲
General Hollow Steel Punch 一般空心钢拳
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。
In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by mean of a punch that causes the metal to flow into the die cavity.
在板金上,拉伸是一个通过冲床将平板金属冲入模腔拉成中空形状工件的工艺过程。
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