Document security, has characteristics printed invariable and variable, and method of manufacturing

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  机译： 带有可变和可变打印字符的安全文档和生产方法

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  机译： 带有可变和可变打印字符的安全文档和生产方法

• 5. SECURITY DOCUMENT CARRYING INVARIABLE AND VARIABLE PRINTED CHARACTERS AND PRODUCTION METHOD [P] . 世界知识产权组织专利： WO2005057480A1 . 2005-06-23

  机译： 带有可变和可变打印字符的安全文档和生产方法

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