%0 Journal Article %T CRITERIA FOR CLASSIFICATION OF IN-PIPE ROBOTS %A Vorochaeva, L.Y. %A Savin, S.I. %K in-pipe robots, classification criteria, contact interaction type, controllable friction, contact element type, motor type, transmission type %J Bulletin of Belgorod State Technological University named after. V. G. Shukhov %D 2018 %N 3 %P 11 %I Belgorod State Technological University named after V.G. Shukhov