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Book, in particular, in the form of an album comprises front and rear covers, a fold line and two slits for a passage of a book back strip folded in the form of a concertina element
Book, in particular, in the form of an album comprises front and rear covers, a fold line and two slits for a passage of a book back strip folded in the form of a concertina element
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机译:特别是相册形式的书,包括前封面和后封面,折线和两个狭缝,用于折回以六角琴形式折叠的书背条
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摘要
The book, in particular, in the form of an album (1) comprises front and rear covers, a fold line (2) and two slits (3, 4) for a passage of a book back strip folded in the form of a concertina element. The same method with a locking element is used for fixing two adjacent paper sheets in such an album.
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