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Application filed by Miroslav Ing Liska, Vaclav Ing MalinskyfiledCriticalMiroslav Ing Liska
Priority to CS861482ApriorityCriticalpatent/CS257922B1/en
Publication of CS148286A1publicationCriticalpatent/CS148286A1/en
Publication of CS257922B1publicationCriticalpatent/CS257922B1/en