内含7z 9.30版本32位和64位两个版本。
7-Zip是一款开源免费压缩解压软件，7-Zip使用了LZMA与LZMA2算法的7z格式，拥有极高的压缩比，通常使用7-Zip压缩的7z格式能比使用zip格式的压缩文件小30-70%。7-Zip相比流行的WinRAR压缩软件，具有压缩率高的优势，但7-Zip图形界面相对比较简单，也没有压缩文档注释功能。但7-Zip能解开比较多文件格式包，支持格式：
压缩/解压缩：7z, XZ, BZIP2, GZIP, TAR, ZIP, WIM
仅解压缩：ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, WIM, XAR, Z
Changes in 7-Zip 9.30 Alpha:
The BUG in 7-Zip 9.26 alpha - 9.29 alpha versions was fixed.
These alpha versions could not open non-solid 7z archive, if
some files were skipped during creation of that archive.
That problem is also related to 7z archives created in solid mode,
if each solid block contains no more than one file.
Note: 7-Zip skips files that were open for writing by another
application and shows warning in that case.
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