FR787888A - Changement apporté aux appareils de préchauffage de gaz ou fluides quelconques, particulièrement applicable aux appareils à air chaud de hauts-fourneaux
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Changement apporté aux appareils de préchauffage de gaz ou fluides quelconques, particulièrement applicable aux appareils à air chaud de hauts-fourneaux
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C21B9/00—Stoves for heating the blast in blast furnaces
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FR787888D1934-06-281934-06-28Changement apporté aux appareils de préchauffage de gaz ou fluides quelconques, particulièrement applicable aux appareils à air chaud de hauts-fourneaux
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Changement apporté aux appareils de préchauffage de gaz ou fluides quelconques, particulièrement applicable aux appareils à air chaud de hauts-fourneaux
Changement apporté aux appareils de préchauffage de gaz ou fluides quelconques, particulièrement applicable aux appareils à air chaud de hauts-fourneaux