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Application filed by Nikolov P Dipl Ing Mitkov, Ivanov I Dipl Ing Nikolov, Penev V Dipl Ing PentschevfiledCriticalNikolov P Dipl Ing Mitkov
Priority to CS865873ApriorityCriticalpatent/CS269705B1/cs
Publication of CS587386A1publicationCriticalpatent/CS587386A1/cs
Publication of CS269705B1publicationCriticalpatent/CS269705B1/cs