Soon eight of us were standing together before the air lock.

Can you meet me in half an hour at air lock five?

And if they've found me, they won't let a simple thing like an air lock get in their way.

They are also known as air locks in the security industry.

As we started to move toward the air lock, I couldn't help asking one more question.

A movement in front of him beyond the air lock.

The door lead into an air lock and Level 4.

They went into the air lock one at a time.

On the end of the room to their left was a large air lock.

They are to be allowed to get well away from the air lock.