Ключевые слова: blue, bucket, coal, construction, conveying, crete, crushed, crusher, crushing, development, digger, ditch, earth, equipment, europe, excavate, excavator, geology, granite, gravel, heavy, industrial, industry, level, machine, machinery, mine, mining, nature, open, pit, plant, processing, quarry, rock, rubber, rubble, sand, see, steel, stone, transport, transportation, truck, viewpoint, working,