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Dimka VASILEVA
PhD Eng., Associate Professor, Technical University of Varna, Department of Manufacturing Technologies and Machine Tools, 1 Studentska Str., 9010 Varna, Bulgaria, d.vasileva@tu-varna.bg
Tanya AVRAMOVA
PhD Eng., Associate Professor, Head of Department, Technical University of Varna, Department of Manufacturing Technologies and Machine Tools, 1Studentska Str., 9010 Varna, Bulgaria, tanya_avramova@tu-varna.bg
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