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Application filed by Zdenek Ing Straka, Svacha MiroslavfiledCriticalZdenek Ing Straka
Priority to CS867500ApriorityCriticalpatent/CS256529B1/en
Publication of CS750086A1publicationCriticalpatent/CS750086A1/en
Publication of CS256529B1publicationCriticalpatent/CS256529B1/en