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Application filed by Pavel Ing Hrstka, Betak Jaroslav, Jan CervinkafiledCriticalPavel Ing Hrstka
Priority to CS838753ApriorityCriticalpatent/CS241211B1/en
Publication of CS875383A1publicationCriticalpatent/CS875383A1/en
Publication of CS241211B1publicationCriticalpatent/CS241211B1/en