| 摘要 |
Security paper ( 1 ) has a security zone ( 2 ) for providing protection against mechanical falsification. The security zone comprises a set of cells ( 3 ) indented in the paper and optionally interconnected by indented link portions, the thickness of the paper being substantially uniform throughout its area that is complementary to the cells ( 3 ) and to the link portions in the security zone ( 2 ).
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