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CONSTRUCTION DE MATERIEL DE PR
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CONSTRUCTION DE MATERIEL DE PR
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Publication of FR722334ApublicationCriticalpatent/FR722334A/fr
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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FR722334D1930-11-271930-11-27Dispositif de protection contre les gaz
ExpiredFR722334A
(fr)