Ключевые слова: architecture, baking, brown, burner, burning, casting, closeup, control, crucible, dust, energy, environment, equipment, factory, field, filling, flame, forging, furnace, gray, hot, industrial, landscape, light, machinery, manufacturing, melting, metal, noise, operation, pollution, process, processing, production, raw materials, red, risk, roar, security, smelting, solid, steel, steel plate, still life, structure, technology, workshops,