File:Siemensvanne nb.jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	20:22, 11 January 2006		690 × 1,137 (734 KB)	commons>Romary	== Description == Français : Four Siemens Martin pour l'affinage d'acier : vanne pour inverser le sens de passage des gaz dans les accumulateurs. Image scannée dans : ''Manuel de la métallurgie du Fer'', Tome 1, par Adolf Ledeburg, édition français

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