Koupit obrázek |
aerial photograph of Whalley Hydro hydroelectric plant Lancashire UK. Whalley Hydro is a community owned 100kW hydroelectric plant using a variable speed Archimedean screw
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Koupit obrázek |
aerial photograph of Whalley Hydro hydroelectric plant Lancashire UK. Whalley Hydro is a community owned 100kW hydroelectric plant using a variable speed Archimedean screw