Ключевые слова: assembly, bolt, builder, closeup, connection, construction, engineer, engineering, equipment, excavation, fitting, fix, flange, gas, heating, industry, installation, installer, iron, labor, laying, metal, nut, pipe, pipe joint, pipeline, pipeline construction, pipeline installation, piping, plumber, plumbing, pump, repair, screw, screwdriver, site, sleeve, steel, supply, tie, tool, trench, tube, tubular, water, water pipe, waterlines, work, worker, wrench,