Ключевые слова: assembly, blue, building, business, car, connection, construction, control, device, electricity, energy, engineering, equipment, factory, fitting, fluid, fuel, gas, heavy, hose, hydraulic, industrial, lift, line, machine, machinery, manufacturing, many, mechanical, metal, oil, part, pipes, plant, power, pressure, production, pump, repair, safety, science, steel, system, technology, tool, tube, valva, valves, work, yellow,