TY JOUR TI RESEARCH CONCENTRATION OF HARMFUL SUBSTANCES IN THE WORKING AREA AIR OF LASER CUTTING UNITS METALS KW maximum permissible concentration (MPC) KW working area air KW gas analysis KW aspirator KW laser cutting JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Taranyuk, I.V. AU Slobodyuk, A.P. AU Fomenko, Y.V. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov