Upper board and seat board which used prominence and depression metal as supprter rib

摘要

The present invention relates to the upper plate of the desk and the seat of the chair used in a general school, and to make a hollow load on the bottom of the upper plate and the seat by using the plastic blow molding method to have a sufficient load capacity, in particular of the desk In this case, the desk is designed to form a rectangular groove with a predetermined width in the center of the top plate, and the groove is provided with a groove for adhering a makeup plate in the groove. It is a semi-permanent and very useful design that can restore the appearance of the desk in a clean state by simply replacing the makeup plate.