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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23F—MAKING GEARS OR TOOTHED RACKS
B23F7/00—Making herringbone gear teeth
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FR439094D1911-01-201912-01-18Perfectionnements dans les machines destinées à tailler des engrenages à dents inclinées ou hélicoidales
ExpiredFR439094A
(fr)