seal bore

例句：

1. 1.The seal was designed to prevent leaks in the cylinder.
   这个密封设计用来防止气缸的泄漏。
2. 2. The machine has a seal bore that allows it to work smoothly even with heavy loads.
   这台机器有一个密封孔，即使负载很重也能顺畅工作。
3. 3.The seal bore is made of high-quality materials and can withstand extreme temperatures.
   这个密封孔是由高质量的材料制成的，可以承受极端温度。