Backpack Trolley Handle,School Bag Trolley Handle,Luggage Parts Backpack,Telescopic Handle With Wheels GUANGDONG SUNDES LUGGAGE ACCESSORY TECHNOLOGIES CO.,LTD , https://www.sundes-global.com Refers to the cloth that is attached to the back of the book block when it is made. The back cover of paperback books is mainly gauze (rarely used lithographic cloth), and is mainly used for sewing thread binding and bookbinding; the hardcover book back covers gauze, non-woven fabrics, and composite materials.
The concept and types of book backs