Ключевые слова: abstract, angle, artistic, background, bare, batch production, bend, bended, bending, bent, black, business, cart, closeup, curve, elbow, engineering, handles, in a row, industrial, industry, iron, manufacture, manufacturing, metallic, pattern, pipe, pipeline, pipes, plumbing, profile, round, selective focus, steel, storage, structure, supply, technology, tube, tubing, ucoated, uncoated, warehouse,