TY JOUR TI DEVELOPMENT OF PIPE WELDING TECHNOLOGY WITH PULSE ARC FITTINGS BY TUNGSTEN ELECTRODE IN ARGON ENVIRONMENT KW pipe welding technology KW pulse arc KW tungsten electrode KW fittings KW hydraulic exploration JO Bulletin of Bryansk state technical university AU Komarov, A.I. AU Vdovin, A.V. AU Zabelin, A.L. AU Tereschenko, A.A. PY 2019 IS 2019 PB Bryansk State Technical University