Ключевые слова: background, black, bolt, brown, circle, closeup, connection, construction, design, energy, equipment, flanges, gas, handwheels, heavy, horizontal, industry, iron large, metal, metallic, nobody, nut, object, oil, old, physical, pipe, pipeline, pressure, rusty, sending, set, silver, spiral, steel, store, stud, studio, tap, technology, thread, tube, valve, welding, white, work,