Book for dispatch by post has four leaves forming cover, outer leaves being longer than inner pages of book and having gummed sections allowing them to be fastened together which are torn off along perforated lines when book is received

摘要

The book for dispatch by post has four leaves forming the cover. The outer leaves (1) are longer than the inner pages (2) of the book and have gummed sections (3) at their ends allowing them to be fastened together. These sections can be torn off along perforated lines (4) when the book is received.