Open hearth furnace, Industrial museum Brandenburg an der Havel, Brandenburg an der Havel, Brandenburg, Germany / Industriemuseum Brandenburg an der Havel, Siemens-Martin-Ofen Stock Photo - Alamy
File:Siemens Martin Ofen Brandenburg.jpg - Wikimedia Commons
Siemens martin ofen hi-res stock photography and images - Alamy
SIEMENS-MARTIN-OFEN - Definition and synonyms of Siemens-Martin-Ofen in the German dictionary