Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
극장에서는 방화막이 화재를 방지하는 데 중요한 역할을 합니다.geukjangeseoneun banghwamak-i hwajae-reul bangji-haneun de jungyohan yeoghal-eul hamnida.In theaters, the fire curtain plays an important role in preventing fires.