coupling aperture

例句：

1. 1. The engineer designed the machine with a precise coupling aperture to ensure smooth operation.
   工程师设计的机器具有精确的耦合孔，以确保顺畅运行。
2. 2. During the assembly process, it's important to match the coupling apertures precisely to prevent leakage.
   在装配过程中，重要的是要准确地匹配耦合孔，以防止泄漏。
3. 3. The new design uses a smaller coupling aperture to reduce weight and improve efficiency.
   新设计使用较小的耦合孔以减少重量并提高效率。