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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
B23D73/00—Making files or rasps
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FR470783D1914-04-111914-04-11Procédé de chauffage et moulage de métaux
ExpiredFR470783A
(fr)
Perfectionnements apportés dans les fours à gazogènes à récupérateurs spécialement en vue du chauffage à haute température de lopins métalliques destinés notamment à la fabrication d'obus