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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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FR492614D1918-10-291918-10-29Perfectionnements dans les moteurs à courant alternatif
ExpiredFR492614A
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