这样的垂直搜索引擎，很好很强大！http://www.pdf-search-engine.com/
可以搜索很多很好的pdf文档。
This entry was posted on 十二月 13, 2008 at 2:15 下午 and is filed under 荡寇志. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
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