up-and-down blanking process

例句：

1. 1.The engineer used a blanking machine to create the holes in the metal sheet.
   工程师使用穿孔机在金属板上打出了孔。
2. 2. During the construction phase, it's important to ensure all materials are properly blanked before installation.
   在施工阶段，确保所有材料在安装前都经过适当的穿孔处理是很重要的。
3. 3. The blanking process helps to reduce waste and improve efficiency during the manufacturing process.
   穿孔处理有助于在制造过程中减少浪费并提高效率。