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
B21D53/00—Making other particular articles
B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
B—PERFORMING OPERATIONS; TRANSPORTING
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
B23K11/00—Resistance welding; Severing by resistance heating
B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
B23K11/008—Manufacturing of metallic grids or mats by spot welding
Procede et installation de manutention de tuyaux en fonte a emboitement en vue de transformer des groupes de tuyaux en nombre pair en groupes de tuyaux en nombre impair
Procede pour disposer des composants electroniques sur des plaques a circuits imprimes, machine automatique pour sa mise en oeuvre et magasin pour une telle machine