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Application filed by Oldrich Ing Liska, Barta Cestmir, Ing Drsc Triska, Ludek RoucekfiledCriticalOldrich Ing Liska
Priority to CS866441ApriorityCriticalpatent/CS254848B1/en
Publication of CS644186A1publicationCriticalpatent/CS644186A1/en
Publication of CS254848B1publicationCriticalpatent/CS254848B1/en