The Engineer opened her air-lock door and waited to see what would happen.

They were most likely standing to the side of each inner air-lock door waiting for the boarding party.

He passed an air-lock door, a small one for personnel.

If he rested, maybe he'd get back enough strength to close the air-lock door.

We've locked the air-lock doors and nobody can get in.

I doubt that a sledge-hammer can break the air-lock door.

In theory, we'll have to open the air-lock doors to get out or strangle.

He stood in the air-lock door for long minutes, staring angrily about.

They shuffled back across the staging area to the air-lock door that led to Level 4.

When he was within half a mile, an air-lock door opened in the ship's side.