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A62B23/00—Filters for breathing-protection purposes
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FR749284D1932-04-131932-04-13Dispositif de filtre à cellules ou éléments amovibles et conjugués pour appareils respiratoires et autres applications
ExpiredFR749284A
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Installation d'appareils pour la concentration des vinasses de distillerie de betteraves combinés pour l'utilisation des vapeurs à la distillerie
Installation d'appareils pour la concentration des vinasses de distillerie de betteraves combinés pour l'utilisation des vapeurs à la distillerie