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Application filed by Vaillant Joh KgfiledCriticalVaillant Joh Kg
Priority to BE502114ApriorityCriticalpatent/BE502114A/en
Publication of BE502114ApublicationCriticalpatent/BE502114A/en
Safety device for catalytic oxidation heating appliances acting on the basis of eventual air pollution. (Machine-translation by Google Translate, not legally binding)