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Application filed by Antonin Ing Cermak, Bohumil Prudek, Amtonin KocikfiledCriticalAntonin Ing Cermak
Priority to CS866507ApriorityCriticalpatent/CS258830B1/cs
Publication of CS650786A1publicationCriticalpatent/CS650786A1/cs
Publication of CS258830B1publicationCriticalpatent/CS258830B1/cs