escape shaft

The T130 rig, in a three-way international race, was the first to open an escape shaft to the men.

As it was not safe for rescuers to blast their way through, a special borer was brought in to drill an escape shaft.

It has two floors, one entrance, and an escape shaft.

They might also connect to an escape shaft.

Sandecker turned and walked to the escape shaft.

The quarry's escape shaft seemed to stretch downward like a great sloping, bottomless pit.

The escape shaft runs on a higher level than the deep end of the quarry where the original flooding occurred.

The Strata 950 was the first of the three drills to begin boring an escape shaft.

This drill team was the first to reach the trapped miners with an escape shaft.

And, of course, when the escape shaft is done .