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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
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FR29162D1924-06-281924-06-28Dispositif de support de pièces à percer, aléser, etc.
ExpiredFR29162E
(fr)