TY JOUR TI HYGIENIC CONDITIONS ON THE WORKPLACE OF THE ELECTRIC AND GAS WELDER 6 DISCHARGE KW harmful production factor KW electric gas welder KW working conditions JO Modern Technologies and Scientific and Technological Progress AU Prusakova, A.V. AU Ustinova, A.S. PY 2020 IS 2020 PB Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University»