What is "pressure dome"

Usage examples of "pressure dome".

A tense group of engineers stood inside the transparent pressure dome, watching the strain gauges on the flare drill.

Our pressure dome base of operations had finally come to rest at a depth of 9,348 feet, which was more than 1,500 fathoms below the surface.

Over their heads Jan saw Rein come out of the pressure dome and begin to push forward through the crowd.

Over their heads Jan saw Rein come out of the pressure dome and begin to push fi)rward through the crowd.

All his life he'd had a whole planet to mess up, and not a crowded pressure dome or the cabin of a ship.

If I judged my opponent correctly, he had started to rush toward the hemispheric pressure dome as soon as he had finished the job of destroying the ship.