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Application filed by Jiri Beranek, Pavel DrasarfiledCriticalJiri Beranek
Priority to CS764974ApriorityCriticalpatent/CS180788B1/cs
Priority to DD185382Aprioritypatent/DD120020A1/xx
Priority to HUCE001041prioritypatent/HU170256B/hu
Priority to SU7502133306Aprioritypatent/SU570617A1/ru
Publication of CS180788B1publicationCriticalpatent/CS180788B1/cs