我需要一个打孔器来在这些纸上打孔。

I need a ___perforator to make holes in these papers.

医生使用穿孔器在颅骨上钻了一个小孔。

The doctor used a ___perforator to make a small hole in the skull.

这台打孔机可以在纸张边缘打出一排小孔，方便撕下优惠券。

This ___perforator punches small holes along the paper edge to make coupons easy to tear off.