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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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FR518011A1919-02-261920-06-27Dispositif de protection contre les fumées et les gaz
ExpiredFR518011A
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