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Application filed by Josef Ing Srtek, Manek Oldrich, Masek Vaclav, Vaclav Ing MalasekfiledCriticalJosef Ing Srtek
Priority to CS865192ApriorityCriticalpatent/CS257237B1/en
Publication of CS519286A1publicationCriticalpatent/CS519286A1/en
Publication of CS257237B1publicationCriticalpatent/CS257237B1/en