Staggering forward, he looked at the air tubes that had once fed him life.

That might be far easier than creating hardened air tubes.

He's locked on the top floor and sends down messages in the air tube.

His only connection to the outside world was an air tube and a bell.

His air tube hung up a couple of times, but he untangled it.

Going up to the grave and taking the air tube.

That, he knew in his heart, had been the reason he'd driven out into the forest last Thursday night and removed the air tube.

But my air tube was connected to the side of the tank, and quite short.

She sent a picture of horse and woman standing under the water, with weird air tubes leading up.

When the bell stopped ringing the air tube was removed.