1.  punching
2.  stiletto
3.  slotting

• 1. 打孔: perforation | Punch | perforate | keypunching | punching
• 2. 打孔卡: punched card | die cut card | punch card | Punch Cards
• 3. 打孔机: punch | Hole puncher | perforating machine | punching machine

更多释义

• 1.这台机器一开始就差点遭遇失败，因为老板们不愿放弃打孔卡。
  This machine almost came unstuck early on because the bosses were hesitant to abandon punch cards.
  dict.yoduao.com
• 2.（列车）乘务员用剪票夹在我们的车票上打孔（验票）。
  The train conductor punched our tickets.
  dict.yoduao.com
• 3.织布机的控制装置由硬打孔卡和吊钩组成。
  The loom is controlled by a system of stiff punch cards and hooks.
  dict.yoduao.com

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