tunnel sealing

例句：

1. 1. The tunnel sealing process is crucial for the safety of the construction workers.
   隧道密封过程对于施工工人的安全至关重要。
2. 2. The tunnel sealing technology has made it possible to excavate through rocky terrains.
   隧道密封技术使得在岩石地形中挖掘成为可能。
3. 3. The tunnel sealing system ensures that air and water are sealed off from the tunnel, preventing leakage.
   隧道密封系统确保空气和水被密封在隧道内，防止泄漏。