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Martin Bajčičák
Institute of Production Technologies, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology Bratislava, ul Jána Bottu 25, 917 24 Trnava, Slovak Republic
Roland Šuba
Institute of Production Technologies, Faculty of Materials Science and Technology in Trnava, Slovak University of Technology Bratislava, ul Jána Bottu 25, 917 24 Trnava, Slovak Republic