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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
B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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FR644382D1927-11-231927-11-23Perfectionnements apportés aux dispositifs de polissoirs automatiques
ExpiredFR644382A
(fr)