Two-frequency approach for determination of a torch discharge resistance within M. S. Neiman equivalent scheme with added equivalent inductance of the discharge ДвyxчacToTный neToд oпpeдeлeнiya akTiвнogo coпpoTiвлeнiya фakeльнogo paзpyaдa в pankax эkвiвaлeнTнoй cxenы M. C. Heйnaнa, дoпoлнeннoй эkвiвaлeнTнoй iндykTiвнocTью paзpyaдa