There was a rush of air as the pressures equalized.

At first it wouldn't open, and he realized that the pressure hadn't equalized yet.

As the pressures equalized the air rush stopped, and so did his heart when he saw Nash floating on the other side of the door.

Then there was a rush of air as the pressure equalized, and the interior door rolled open.

Eight bars outside, one bar inside; it would keep coming until the pressure equalized.

Here, pressure equalizes between all of the chambers of the heart.

Then the pressure equalized and water gurgled away beneath the hatch.

Maybe the being's internal pressure had equalized sufficiently to save it.

The pressure equalized now that the compartment was flooded, the hatch opened.

There was a puff of air, as the pressure within the two ships equalized.