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B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
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FR700677D1929-08-191930-08-14Perfectionnements aux outils pour fraiser ou roder les soupapes et les sièges de soupapes
ExpiredFR700677A
(fr)