TY JOUR TI VR / AR TECHNOLOGIES AND THEIR APPLICATION IN MECHANICAL ENGINEERING KW virtual reality KW augmented reality KW mechanical engineering KW design KW VR KW AR JO Automation and modeling in design and management AU Feofanov, A.N. AU Okhmat, A.V. AU Berdyugin, A.V. PY 2019 IS 2019 PB Bryansk State Technical University