“竖井”造句

竖井已经打下，并且挖有横向矿道。
Shafts were sunk, with tunnels dug laterally.

空气向下进入竖井,因而失去势能.
The air flows down to a shaft and thus loses potential energy.

潜水员于上周末进入竖井,但没什么进展.
Divers headed into the shafts over the weekend but made little progress.