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Application filed by Laszlo TothfiledCriticalLaszlo Toth
Priority to HU156290ApriorityCriticalpatent/HUT59463A/en
Publication of HU901562D0publicationCriticalpatent/HU901562D0/en
Publication of HUT59463ApublicationCriticalpatent/HUT59463A/en
HU156290A1990-03-141990-03-14Method for making suitable for draining natural gas combustion product of traditional brick-built chimney ducts
HUT59463A
(en)