pressure manhole

例句：

1. 1.The pressure manhole is located at the bottom of the tunnel.
   压力井盖位于隧道底部。
2. 2. The workers carefully removed the pressure manhole cover.
   工人们小心翼翼地移开了压力井盖。
3. 3.The pressure manhole was designed to prevent water from leaking into the tunnel.
   压力井盖的设计是为了防止水渗入隧道。