User-agent: Yandex
Disallow: /*_openstat
Disallow: /*from=adwords
Disallow: /*utm_source
Disallow: /downloads/
Disallow: /?search
Host: www.demidovsteel.ru

User-agent: Googlebot
Disallow: /*_openstat
Disallow: /*from=adwords
Disallow: /*utm_source
Disallow: /downloads/
Disallow: /?search

User-agent: *
Disallow: /downloads/
Disallow: /?search