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F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
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FR577176D1923-03-311924-02-15Procédé et four pour chauffer, tremper et recuire les métaux, les matières céramiques et les matières analogues
ExpiredFR577176A
(fr)