In modern fountains the traditional gravitational pressure from an unseen reservoir at a higher level is not always practical.

The hole's gravitational pressure is strong enough to distort light, as you can see here, making all the images themselves appear contorted.

Under that kind of gravitational pressure, excavation of the planet would be a long, difficult, dangerous job.

The most gravitational pressure they would face they had already endured in entering the mouth.

Kirk pictured the reality of the star's inferno, heat born of gravitational pressure, waiting to break into this haven.

The matter emerging from the fountain has undergone intense gravitational pressure and temperature fluctuations.

The gravitational pressure eased far more abruptly than it had begun.

This core is under huge gravitational pressure.

At the center, the in-falling matter became denser under the terrific gravitational pressure until it turned almost completely into neutrons.

Under these cramped conditions, the strong nuclear repulsion forces were finally able to resist the gravitational pressure.