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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
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FR615252D1926-04-281926-04-28Dispositif combiné d'inhalateur et de filtre formant appareil respiratoire
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