Artificial gravity grid
The artificial gravity grid was a series of interconnected artificial gravity-producing devices.
In 2373, Miles O'Brien had to recalibrate Deep Space 9's EPS regulators so they wouldn't interfere with the space station's artificial gravity grid. Nog volunteered himself and Jake Sisko for the mundane task so O'Brien could go kayaking in a holosuite instead. (DS9: "In the Cards")