This self-correcting performance prevents wet material from purging at the cake discharge.

They are conducted underground to prevent radioactive material from being released into the atmosphere.

Additionally, all publications had to clearly state the names of the author, artist, and publisher, to prevent unapproved material from being produced.

The safety curtain is not intended to create an air seal but rather prevent material from falling from the stage house into the audience.

This prevents threatening unconscious thoughts and material from entering the consciousness.

This is necessary to prevent attacks on their own chicks or nesting material from neighbours.

This containment absorbs radiation and prevents radioactive material from being released into the environment.

These forces also can prevent material too close to the planet from coalescing into a larger body.

Prior restraint is censorship which prevents material from being published in the first place.

It was hoped to prevent material being lost on the death of a molinologist by creating a suitable repository.