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The main techniques used for passport book sewingside stitching (fig. 1); saddle stitch method (fig. 2–4). In the first case sheets of a book block bound by a saddle stitching and sewed by a thread along the binding edge, i.e. at a certain distance from the spine. In the second case sheets are bound by a saddle stitching and joint by a thread or metal staples along the whole binding edge (fig. [..]
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