11.   Inside the servo valve, the flow of hydraulic fluid is controlled by two sliding valves.

12.   Investigators said the crash occurred after a hydraulic line was chafed by a nearby electric line, spilling hydraulic fluid.

13.   Jams can occur because of contaminants in the hydraulic fluid.

14.   One theory that has not been abandoned and will be discussed this week is that contaminated hydraulic fluid could have caused the rudder to jam.

15.   Releases or spills of oil, grease and hydraulic fluids from mining equipment also could pollute the swamp.

16.   Rocket motors on the Delta III were trying so hard to steer the wavering vehicle during its final seconds of flight that they literally ran out of hydraulic fluid.

17.   Sometime after it left the deck, a crew member reported smoke and a large amount of leaking hydraulic fluid.

18.   The carbon fiber and fiberglass tanks hold five gallons of hydraulic fluid under high pressure, which raises safety questions in the event of an explosion.

19.   The Darmstadt, Germany-based venture researches, makes and sells lubricant additives used in motor oil, hydraulic fluids and automotive transmissions.

20.   The flow of the hydraulic fluid would also make such a car noisy.