Ключевые слова: 3d, animation, background, basement, cellar, channel, concrete, construction, dark, detail, dim, dusky, endless, energy, engineering, factory, industrial, industry, iron, machine, machinery, manufacture, mechanical, metal, metallic, metallurgy, motion, old, pipe, pipelines, pipes, plumbing, power, production, rust, rusted, rusty, shaded, shady, steel, structure, subway, technology, timeworn, transportation, tubes, tunnel, underground, underpass, worn,