File:Nitroglycerine factory at Engene, Sætre, Hurum, Buskerud, Norway (1876).jpg
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Nitroglycerine_factory_at_Engene,_Sætre,_Hurum,_Buskerud,_Norway_(1876).jpg (800 × 566 pixels, file size: 65 KB, MIME type: image/jpeg)