centre of punch

例句：

1. 1. The printer's centre of punch is located in the back.
   打印机的打孔机中心位于后面。
2. 2.The punch was designed to fit perfectly into the centre of the card.
   这个打孔器被设计成完美地插入卡片的中心。
3. 3.The punch was used to make holes in the paper for the design to be printed on.
   这个打孔器用来在纸上打出设计图案需要印刷的位置。