To remove trapped air, use a process called bleeding.

Near the top, on the end opposite the supply valve, find the small bleeder valve, which must be opened to let trapped air out.

When this happens the trapped air will remain in the radiator and keep the hot steam out.

My point is, any trapped air pushes strongly to get out.

This trapped air makes wood float in water.

This process hopes to eliminate any trapped air from binding to the impurities in the freezing process.

It's the trapped air that supports the hexes.

It chose that moment to tip the final balance between trapped air and weight, and dropped completely below the waves, sinking.

Reacher went out through the hot trapped air in the stairwell and stepped outside.

Immediately before extrusion, the mass is passed through a vacuum chamber to remove any trapped air.