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Application filed by Karel Ing Sobr, Vaclav Prokes, Frantisek Bejcek, Petr Ing Csc Peca, Stanislav KoprivafiledCriticalKarel Ing Sobr
Priority to CS827579ApriorityCriticalpatent/CS238587B1/cs
Publication of CS757982A1publicationCriticalpatent/CS757982A1/cs
Publication of CS238587B1publicationCriticalpatent/CS238587B1/cs