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Application filed by Strejc Josef, Frantisek Ing Sledr, Frantisek Fremund, Josef CibulkafiledCriticalStrejc Josef
Priority to CS876378ApriorityCriticalpatent/CS263070B1/en
Publication of CS637887A1publicationCriticalpatent/CS637887A1/en
Publication of CS263070B1publicationCriticalpatent/CS263070B1/en