step aperture

例句：

1. 1. The engineer designed a step aperture for the new machine to improve its efficiency.
   工程师为新机器设计了一个步进孔，以提高其效率。
2. 2.During the construction phase, we need to ensure that all steps apertures are properly sealed to prevent leaks.
   在施工阶段，我们需要确保所有步骤孔都密封好，以防止泄漏。
3. 3. The technician carefully measured and drilled the steps apertures in the wall to ensure proper installation.
   技术员仔细测量并钻孔了墙壁中的步进孔，以确保正确安装。