| 摘要 |
A cover member of a book includes: at least a foldable bookmark flap integrally formed on a longitudinal edge of a book cover or a dust cover of a book, or a foldable flap integrally secured to an upper edge or a bottom edge of the cover, whereby upon folding of the bookmark flap to be inserted between the pages of the book, a bookmark is provided for conveniently marking a reading place in the book and the flap inserted into the pages of the book will also protect the pages from dust contamination or atmospheric oxidation.
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