Ключевые слова: background, blue, centrifugal, control, craftsman, electric, electrical, electricity, energy, engine, engineer, engineering, equipment, factory, gear, industrial, industry, job, labor, machine, machinery, maintenance, mechanical, mechanism, metal, motor, people, person, pipe, pipeline, piping, plant, plumber, power, pressure, profession, pump, real, repair, repairman, steel, system, technology, tool, valve, water, wire, work, worker,