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Application filed by Vladimir Ing Stary, Vi Lem Ing Simak, Zachoval Jaromir, Kudrna Stanislav, Bohumil PovolnyfiledCriticalVladimir Ing Stary
Priority to CS833113ApriorityCriticalpatent/CS238911B1/en
Publication of CS311383A1publicationCriticalpatent/CS311383A1/en
Publication of CS238911B1publicationCriticalpatent/CS238911B1/en