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Application filed by Zdenek Ing Cervinka, Bohumil Falta, Josef Janda, Josef SimafiledCriticalZdenek Ing Cervinka
Priority to CS844518ApriorityCriticalpatent/CS242994B1/cs
Publication of CS451884A1publicationCriticalpatent/CS451884A1/cs
Publication of CS242994B1publicationCriticalpatent/CS242994B1/cs