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Platte 8048-A. Effiziente Heizungsmessungen. [Abbildung].
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Platte 8046-A. Effizienter Heizungsbau.
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Effiziente Heizungen zur Erwärmung von Wasser mit Dampf.
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[Tafel 8045-A. Effiziente Heizung senkrecht aufgestellt.]
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