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Application filed by Bohuslav Ing Csc Vencl, Kopecny Jan, Vlasta HladkafiledCriticalBohuslav Ing Csc Vencl
Priority to CS895416ApriorityCriticalpatent/CZ277686B6/en
Publication of CS541689A3publicationCriticalpatent/CS541689A3/en
Publication of CZ277686B6publicationCriticalpatent/CZ277686B6/en