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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
B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
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FR432258D1910-07-151911-07-15Procédé pour former des treillis à l'aide de plaques métalliques fendues, des fers méplats ou autres
ExpiredFR432258A
(fr)