BOOK WITH ROUNDED CORNERS TO PREVENT STUDENT SAFETY ACCIDENT

摘要

Books with rounded edges are provided to prevent student safety accidents. The book includes a plurality of endothelial papers, one side of which is a plurality of endothelial papers bound by binding; and a cover paper disposed to cover the front and rear surfaces of the plurality of endothelium, wherein each of the plurality of endothelium is located on the opposite side of the one side and at least one vertex connected to the other side parallel to the one side is round processing is in a state of being