Compact ROR hydropower generator for use in rivers and streams #DigInfo

Compact ROR hydropower generator for use in rivers and streams http://www.diginfo.tv/v/12-0219-r-en.php DigInfo TV - http://diginfo.tv 5/12/2012 Renewable Energy 2012 Exhibition Ibasei - http://www.ibasei.jp/ Cappa Project - http://earthmilk.jp/top.html