File:US591909A Argall rotary furnace transversal view patent.png

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Français : Vues en coupe du four breveté par Philip Argall, de type multitubulaire pour le grillage de minerais broyés. Brevet déposé le 19 oct. 1897.
English: Cross view of the kiln patented by Philip Argall, which is a multi-tubular one, designed to roast grinded ores. Patent dated 19 oct. 1897.
Date
Source Patent US 591909A
Author Philip Henry Argall (1854 - 1922)

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