1.   In Africa the masks are used to ward off evil spirits.

2.   Integrated circuits are made from layers of materials by a process which includes etching using various masks which are made photographically.

3.   Finally, an aluminium coating is applied which is partly evaporated using a mask, leaving behind the interconnections between components formed in the semiconductor layer.

4.   But the facemask also adds a degree of recklessness to the sport, with some players diving headfirst to block shots or use their mask as defensive weapons.

5.   Dan Wilson, a former goalie, said he might use the mask later this spring or in the regular season.

6.   Each mask represented the verse of a song, and since each song had two or three verses, two or three masks were used together in a dance.

7.   If the band is funny, it is funny like the mime Marcel Marceau, using the mask of a clown to better delineate tragedy.

8.   In conventional lithography, a mask is used with transparent areas and opaque areas, like a photographic negative.

9.   Others use mechanized masks.

10.   The new study found that when snorers used a mask, they and their spouses reported better sex lives.