FR943544A - Perfectionnements aux moyens propres à permettre la respiration en milieux chargésd'impuretés, telles les atmosphères de mines et analogues
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Perfectionnements aux moyens propres à permettre la respiration en milieux chargésd'impuretés, telles les atmosphères de mines et analogues
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A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B7/00—Respiratory apparatus
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FR943544D1946-08-141947-03-24Perfectionnements aux moyens propres à permettre la respiration en milieux chargésd'impuretés, telles les atmosphères de mines et analogues
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