They cut holes on the sheet of metal with apunchpress.
他们用冲床在金属板上打孔。
2
It designs a quick-change punch die structure, which can be used for combination punch die and flexible punch press system.
设计了一种可应用于组合冲模及柔性冲压系统的快换冲模机构。
3
Punchpress: machine tool that changes the size or shape of a piece of material usually sheet metal by applying pressure to a die in which the workpiece is held.