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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
F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
F27B7/2016—Arrangements of preheating devices for the charge
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FR715394D1930-08-141930-08-14
Process and devices for drying pulp intended for the manufacture of artificial cement or any other material
ExpiredFR715394A
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