11. The supplied main energy source may be electric current, hydraulic fluid pressure , or pneumatic pressure. 12. The fluid pressure is compared to the ice overburden pressure, p i, given by ?gh. 13. Hydronic systems require skilled designers and tradespeople familiar with boilers, circulators, controls, fluid pressures and temperature. 14. The tentacles are hollow, held upright by fluid pressure , and can be moved individually by muscles. 15. When the tube narrows, the fluid pressure decreases. 16. Glaucoma involves damage to the optic nerve, often from too much fluid pressure in the eye. 17. Fluid pressure increases with depth because of the ( gravitational ) weight of the fluid above.18. These actuators use the fluid pressure force to generate a traction force or a bending movement. 19. This holds the fluid pressure when the piston slides in and out and makes the pump leak-tight. 20. The doctors diagnosed M�ni�re's disease, a condition in which fluid pressure builds up in the inner ear.
