Ключевые слова: abandoned, background, bagger, belt, big, bucket, caterpillar track, coal, coal field, coal mine, construction, conveyor, destruction, digging, engine, excavation, excavator, geology, industrial, industry, iron, large, load, machine, mine, open pit, ore, ore deposit, pit, pollution, sediment, steel, transport, transportation, trench digger, trencher, wheel,