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F23H3/02—Grates with hollow bars internally cooled
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FR593645D1925-02-021925-02-02Grille aérifère permettant la combustion totale des fumées et des gaz combustibles incomplètement brûlés
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Perfectionnements apportés aux procédés et aux foyers soufflés pour brûler des combustibles laissant des déchets provenant de la combustion, cendres, mâchefers, etc.