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A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B23/00—Filters for breathing-protection purposes
A62B23/02—Filters for breathing-protection purposes for respirators
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FR1168469D1957-01-211957-01-21Face réglable pour appareil de protection contre les poussières de toutes sortes, les gaz toxiques, etc.
ExpiredFR1168469A
(fr)