Ключевые слова: boiler, building, business, chemistry, construction, control, energy, engineering, equipment, fabrication, factory, fitting, flange, fuel, gas, grinding, heat, heavy, industrial, industry, iron, lapping, machine, machinery, manufacturing, mechanical, metal, metallic, modern, pipe, pipeline, piping, plant, plumbing, power, pressure, production, pump, reinforcement, stainless, steel, structure, system, technology, treatment, tube, utility, valve, work, worker,