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![]() | 2,183 × 2,319 (413 KB) | Rene Keil | {{Information |Description=Sankey-Diagramm von Cpt. Sankey (The Thermal Efficiency of Steam Engines) |Source=Minutes of Proceedings of The Institution of Civil Engineers. Vol. CXXXIV, Session 1897-98. Part IV |Date=1898 |Author=M. H. Sankey |Permission= | |
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