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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
B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
B24B55/06—Dust extraction equipment on grinding or polishing machines
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FR468484D1914-02-161914-02-16Perfectionnements dans les appareils à meuler
ExpiredFR468484A
(fr)