(When you use Acrobat, adobereader and other software to detect PDF files, some documents use security passwords, which cannot be corrected. They are saved as other heterogeneous files such as DOC, JPG and other formats. At the same time, some documents with high security cannot be printed after such encryption. 's documentation. Fortunately, there are such cracking software, but the best one is PDFPasswordRemover~~ I uploaded a PDFPasswordRemover3.0 green version, no need to install, the software is fine! !)
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