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Application filed by Cernin Vaclav, Josef Ing SimecekfiledCriticalCernin Vaclav
Priority to CS870088ApriorityCriticalpatent/CS272531B1/en
Publication of CS870088A1publicationCriticalpatent/CS870088A1/en
Publication of CS272531B1publicationCriticalpatent/CS272531B1/en