Ключевые слова: architecture, background, build, building, clay, construct, construction, crushed, development, dig, dirt, earth, equipment, excavating, excavation, fine, granite, gravel, gray, ground, heap, improvement, industrial, industry, material, mineral, mound, mounds, natural, outdoors, pile, pit, project, quarry, rough, rubble, sand, shovel, shovels, site, soil, spade, stack, steel, structure, stuck, tool, work, worker,