Ключевые слова: aerial, beautiful, construction, deep, digger, digging, ecology, engineering, environment, equipment, excavator, extraction, forest, fossil, geological, geology, gravel, ground, heavy, industrial, industry, landscape, large, machine, machinery, manufacturing, metal, mine, mineral, mining, natural, nature, open, opencast, outdoor, pit, quarry, quarrying, road, rock, sand, stone, summer, surface, technology, tree, vehicle, wilderness, work,