Page not found (error 404)

The page http://ftp.iltecnicofacile.altervista.org/B1.2%20Tubi%20acciaio%20DN%20-%20calcolo%20peso%20superficie.html was not found on this server.

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http://site.altervista.org/Page.html is different from http://site.altervista.org/page.html