The women suffocated after an air pipe was deliberately closed off.

He jerked back, fearful that he was going to get stuck and cut through his own air pipe.

Two miners survived by breaking into an air pipe that led to the surface.

All that mattered was getting those air pipes down into the cruiser.

He climbed up on a seat, and examined the air pipe more closely.

The air pipes were a little more than a yard across.

Rod leaned out until he could get his hands on the compressed air pipes that ran along the roof of the tunnel.

He was inching his way along the compressed air pipe for yet another advance up the drive.

During the winter months, the compressed air pipes often froze, and this would lead to several days of service interruptions.

It can easily explode if an oil spot remains inside the anfractuous air pipes.