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Application filed by Arnost Ing Pala, Bretislav ZidekfiledCriticalArnost Ing Pala
Priority to CS846060ApriorityCriticalpatent/CS241799B1/en
Publication of CS606084A1publicationCriticalpatent/CS606084A1/en
Publication of CS241799B1publicationCriticalpatent/CS241799B1/en