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A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
A62B18/02—Masks
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FR847052D1938-12-051938-12-05Procédé et appareillage pour l'obtention des masques à gaz
ExpiredFR847052A
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