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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
B21H1/00—Making articles shaped as bodies of revolution
B21H1/02—Making articles shaped as bodies of revolution discs; disc wheels
B21H1/04—Making articles shaped as bodies of revolution discs; disc wheels with rim, e.g. railways wheels or pulleys
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FR368593D1906-08-021906-08-02Méthode et appareil pour la fabrication de roues pour voitures de chemins de fer et autres véhicules
ExpiredFR368593A
(fr)