Constructive disposition introduced in the binder school

摘要

"Constructive provision introduced in the binder at school".Understood by school binder (1) with rectangular openings (2) in the upper layer (3), slightly rounded at the corners.Located in the grip ring (4) which hold the sheets (5) of the binder (1) through holes (6),In order to compensate for the empty space left in this portion (7) when the binder is with few leaves.