TY JOUR TI ENSURING QUALITY OF ASSEMBLY OF THE COLLECTOR OF THE BOILER UNIT KW a collector of the boiler economizer KW installation for welding KW control of a welded seam KW a macro-structure of a welded seam KW defects of a welded seam JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Duyun, T.A. AU Bocharnikova, G.V. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov