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TELEPHONES SOC IND
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TELEPHONES SOC IND
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Publication of FR808833ApublicationCriticalpatent/FR808833A/fr
A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B23/00—Filters for breathing-protection purposes
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FR808833D1935-11-081935-11-08Perfectionnements aux appareils de protection contre les gaz nocifs et les particules en suspension dans l'air
ExpiredFR808833A
(fr)
Garniture de filtration uniforme pour tous types de filtres, applicable notamment àla protection contre les gaz, les vapeurs et les particules solides, nocifs de l'atmosphère