1.   His mask fitted well, the valve worked properly, the large cylinder in use was two-thirds full.

2.   He grabbed a large plastic cylinder filled with flares and other survival gear then climbed out of the hatch.

3.   Then the bird is put into a large metal cylinder that has rubber fingers on the sides.

4.   They live in six large transparent cylinders connected by clear tunnels, something like an ant farm.

5.   The prayer wheels, large copper cylinders, are a story in themselves.