Ключевые слова: background, base, closeup, concept, construction, crushed, detail, freight, gravel, industrial, industry, infrastructure, line, material, metal, natural, outdoor, pattern, pebbles, perspective, planks, quarry, rail, railline, railroad, railway, road, rock, rocks, rough, rubbles, solid, steel, stones, structure, sub, subgrade, surface, texture, tracks, train, traintracks, transport, transportation, travel, wooden,