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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
B23K5/00—Gas flame welding
B23K5/22—Auxiliary equipment, e.g. backings, guides
Machine destinée à reproduire par impression des plans, dessins, écritures etc. au moyen de clichés obtenus, par exemple, par le procédé photoferrogélatinographique.