@base . a , ; "Annual Journal of Technical University of Varna" . "Bulgaria" . a . a ; . , ; "Annual Journal of Technical University of Varna." ; ; ; ; ; "Annual Journal of Technical University of Varna" , "Annual Journal of Technical University of Varna." ; ; "https://aj-tuv.org/index.php/ajtuv" . . a ; "20230525093417.043684"^^ ; ; . a ; "2603-316X" ; .