Ключевые слова: black, black coal, coal, coal cutter, coal excavator, coal shearer, coalcutter, cutter, dark, deposit, dig, digger, earth mover, engineering, environment, equipment, excavate, excavator, exploitation, fuel and power generation, geology, heavy industry, industry, loader mining, longwall, machine, machinery, mine, mine workings, miner, mineral, power, quarry, raw material, rock, shaft, shearer, stone, tool, tunnel, tunneling, underpass, wall, work, worker,