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Application filed by Karel Ing Crhak, Zdenek FuchsigfiledCriticalKarel Ing Crhak
Priority to CS848123ApriorityCriticalpatent/CS243261B1/en
Publication of CS812384A1publicationCriticalpatent/CS812384A1/en
Publication of CS243261B1publicationCriticalpatent/CS243261B1/en