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Application filed by Vratislav Ing Stepar, Arnost Ing Csc Hurych, Josef Rychtera, Prokop Ing Csc Koubek, Pliva JirifiledCriticalVratislav Ing Stepar
Priority to CS843911ApriorityCriticalpatent/CS253353B1/cs
Publication of CS391184A1publicationCriticalpatent/CS391184A1/cs
Publication of CS253353B1publicationCriticalpatent/CS253353B1/cs