11.   The problem valve regulates the flow of nitrogen gas in the left maneuvering engine.

12.   The process, developed in Japan, involves bubbling nitrogen gas through the water to deoxygenate it.

13.   The safety board last year strongly recommended that inert nitrogen gas be pumped into jetliner fuel tanks to lessen the danger of an explosion.

14.   Though the valve was then closed, the seal was not tight and nitrogen gas began forcing out the cooling water.

15.   When the bag is activated, sodium azide is detonated, and the resulting effusion of nitrogen gas inflates the bag.

16.   A few firms will even pump out the oxygen and fill time capsules with Silica gel to soak up moisture or argon or nitrogen gas to preserve fragile contents.

17.   A joint airline industry-FAA task force is looking at whether to recommend that airlines pump nitrogen gas into the tanks.

18.   A joint industry-FAA task force is looking at whether to recommend that airlines pump nitrogen gas into the tanks.

19.   A sudden rush of nitrogen gas killed three workers and injured four others at a plant that makes equipment for the offshore oil industry, fire officials said Friday.

20.   Authorities said the explosion was probably caused by the ignition of a tank of nitrogen gas.