| As the crews approached the drop zone, they depressurized the planes and opened the cargo doors. |
| As soon as the shuttle's passenger cabin was locked up tight, the shuttle bay depressurized. |
| Then he depressurized the pod and opened the hatch, leading the others onto the rocky surface of Eros. |
| Hermetic seals hissed as they depressurized and the upper chest shell swung open. |
| Chambers were slowly depressurized after treatment, and the animals were reverted to breathing room air thereafter. |
| Red lights came up as I closed the shuttle's hatch and a green came on as the boarding tube depressurized. |
