The idea had been to bolt everything down in case the gravity controls failed.

It wasn't just gravity control they got from the Buggers.

And cellulose is cheap enough if we can get gravity control from them.

I admitted to some enthusiasm over the possibilities of gravity control.

If it weren't for gravity control, he'd have been plastered to the wall.

He had cut local gravity control to facilitate the installation of the ship's drive units.

Neutron stars might give us the key to true gravity control.

When Laura turned 16, her powers of gravity control manifested.

Quietly he adjusted the gravity control to a boost of ten percent.

He took that to be a good sign because he knew they operated by gravity control.