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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between rollers
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FR607637D1925-03-171925-03-17Machine à emboutir destinée plus particulièrement à la fabrication des ailes de garde-boue et autres objets
ExpiredFR607637A
(fr)
Perfectionnements à la préparation de catalyseurs métalliques destinés particulièrement à la fabrication de l'ammoniaque synthétique et à d'autres usages