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Application filed by Prokopi P Dipl Ing Andreev, Vesselin G ManevfiledCriticalProkopi P Dipl Ing Andreev
Priority to CS831116ApriorityCriticalpatent/CS242253B1/en
Publication of CS111683A1publicationCriticalpatent/CS111683A1/en
Publication of CS242253B1publicationCriticalpatent/CS242253B1/en