1.   The gas bubbles get trapped if you add flour, lifting the dough and making it porous.

2.   Care is taken during the filling stage to avoid trapping bubbles in the cell.

3.   Air embolism occurs when a bubble of air is trapped in the bloodstream.

4.   In contrast, when the air is warm and dry, they can dry too quickly and trap air bubbles in the film.

5.   In the process, air bubbles are trapped, giving ice an opaque appearance.

6.   There is also the risk of air embolisms, which occur if a gas bubble becomes trapped in the bloodstream or tissue or under the skin.

7.   Air bubbles became trapped in the hydraulic system, but not enough to cause a concern, Sieck said.

8.   Another possibility is that an air bubble became trapped in the line.

9.   Engineers believe an air bubble became trapped in a critical hydraulic line.