%0 Journal Article %T ACOUSTIC SAFETY SUPPORT AT MACHINING FLAT PARTS WITH BALL-ROD HARDENER %A Tamarkin, M.A. %A Tischenko, E.E. %A Isaev, A.G. %K %J Bulletin of Bryansk state technical university %D 2018 %N 2018 %P 7 %I Bryansk State Technical University