| 摘要 |
This binding is of the type comprising a sheaf of transparent wallets contained between the back cover and the front cover of the binding. The back cover 3 and the top cover 2 are formed by a sheet of paper 4, one of whose sides is made composite by being covered with a very thin sheet of polypropylene 5, and the other side of which is decorated by printing followed by optional glazing. A sheaf of polypropylene wallets 6 between these back and front covers is fixed in place by direct interaction between the polypropylene of the wallets and the polypropylene covering the insides of the back cover and optionally of the front cover. <IMAGE>
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