Ключевые слова: axles, background, belt, blue, brown, business, carbon, chemical, china, closeup, coal, color, construction, conveyor, derrick, development, dig, economy, energy, engineering, equipment, extractive, facilities, fossil, industrial, industry, lignite, machine, machinery, manufacturing, mine, miner, mineral, open, opencast, outcrop, pit, power, production, rollers, station, steel, strip, system, technology, transmission, transport, transportation, transporter, work,