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Application filed by Ladislav Ing Vavra, Lumir JakesfiledCriticalLadislav Ing Vavra
Priority to CS886753ApriorityCriticalpatent/CS275275B2/cs
Publication of CS675388A2publicationCriticalpatent/CS675388A2/cs
Publication of CS275275B2publicationCriticalpatent/CS275275B2/cs