A curtain which closes the stage of a theater from the auditorium automatically in case of fire, preventing the spread of flame and smoke; usually fabricated of woven asbestos and steel wire, it may be nonrigid, semirigid, or rigid.
A curtain which closes the stage of a theater from the auditorium automatically in case of fire, preventing the spread of flame and smoke; usually fabricated of woven asbestos and steel wire, it may be nonrigid, semirigid, or rigid.