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Pyhkoski . en The main door of the Pyhkoski hydroelectric power plant in the Oulujoki river in Leppiniemi Muhos Finland fi Aarne Ervin suunnitteleman Oulujoen Pyhkosken voimalan povi Leppiniemess Muhoksella own SeppVei Cczero Doors in Finland Pyhkoski power plant August in Finland Taken with Canon PowerShot IS