Ключевые слова: activity, ball mill, bright, chile, chilean, copper, crushed, crushig, cylinder, equipment, extraction, factory, grinder, grinding mill, heavy, heavy duty, illuminated, industrial, industrial image, industrial photography, industry, interior, latin america, latin american, light, machinery, machines, mill, mine, mineral, mining, natural resources, night, on motion, plant, processing, south america, south american, stock image, stock photography, turning,