User-agent: Slurp
Disallow: /*.pdf$
Allow: /*?$

User-agent: Acrobat Webcapture
Disallow: /

User-agent: Wget 
Disallow: /

User-agent: baiduspider 
Disallow: /

User-agent: baidu
Disallow: /

User-agent: BaiDuSpider 
Disallow: /

User-agent: Baiduspider+(+http://www.baidu.com/search/spider.htm)
Disallow: /