In the hallway, Surgeon 1 handed him a small gray cylinder that fit conveniently into his hand.

A long gray cylinder sat in a nest of plastic packing material.

He, or rather his body, was really only a grey cylinder of considerable size.

Except that this was not the dull gray cylinder everyone had seen before.

Sometimes they carried the gray cylinders, at other times large yellow tanks.

It was a translucent gray cylinder suspended between two black glass slabs.

He saw only the rear of it as massive gray cylinders slid and worked.

While he watched, the gray cylinder of blanket moved rapidly to the right, away from the main body of the mountain.

A gray cylinder the size of his hand floated ten meters away.

In each place, each beam deposited a dull gray cylinder.