压缩解压神器 7-Zip v20.02 Alpha + v19.00 Final

7-Zip 是一款免费的文件压缩/解压软件，拥有极高的压缩率。7-Zip特有的高解压速率，是其它的压缩软件难以相比的。

7-Zip中文版源自 LZ77 的优化改进的 LZMA 算法，具有高压缩率、可变的字典大小、高解压速率、低解压内存消耗等优点，现已被很多脚本安装程序作为默认的压缩算法。LZMA 算法在 GNU LGPL 协议下开放源代码，您可以从 7-Zip 官方网站或者 SF 服务器下载使用。7-Zip 支持的压缩格式非常之多，包括独有的 7z 文件，压缩与解压 7z, ZIP, GZIP, BZIP2 和 TAR 文件，以及解压 RAR, CAB, ISO, ARJ, LZH, CHM, MSI, WIM, Z, CPIO, RPM, DEB 和 NSIS 等文件。

更新日志

V20.02 Alpha (2020-08-08):
– The default number of LZMA2 chunks per solid block in 7z archive was increased to 64.
It allows to increase the compression speed for big 7z archives, if there is a big number of CPU cores and threads.
– The speed of PPMd compressing/decompressing was increased for 7z/ZIP/RAR archives.
– The new -ssp switch. If the switch -ssp is specified, 7-Zip doesn’t allow the system to modify “Last Access Time” property of source files for archiving and hashing operations.
– Some bugs were fixed.
– New localization: Swahili.

v20.00 alpha 2020-02-06
– 7-Zip now supports new optional match finders for LZMA/LZMA2 compression: bt5 and hc5, that can work faster than bt4 and hc4 match finders for the data with big redundancy.
– The compression ratio was improved for Fast and Fastest compression levels with the
following default settings:
– Fastest level (-mx1) : hc5 match finder with 256 KB dictionary.
– Fast level (-mx3) : hc5 match finder with 4 MB dictionary.
– Minor speed optimizations in multithreaded LZMA/LZMA2 compression for Normal/Maximum/Ultra compression levels.
– bzip2 decoding code was updated to support bzip2 archives, created by lbzip2 program.
– Some bugs were fixed.
– New localization: Turkmen.

官网 http://www.7-zip.org

官方下载（Alpyha）
https://7-zip.org/a/7z2002.exe
https://7-zip.org/a/7z2002-x64.exe

官方下载（正式版）

历史版本
http://sourceforge.net/projects/sevenzip/files/7-Zip/

网盘下载（19.00 修改版）
https://pan.baidu.com/s/1QGKinFhpkOmu4XE8dwDJQg 提取码：gli6

修改版特点：
该版可用于解压 NSIS 程序
可解压出NSIS脚本
可解压出安装包所用部分其他资源
使用了 Sparanoid 美化图标并补全格式
右键菜单图标修改
右键菜单参照 WinRAR 翻译
安装包无流氓，32位&64位二合一