Ключевые слова: activity, background, building, bulldozer, caterpillar, construction, contractor, development, digger, digging, dirt, earth, earthmover, engine, engineering, equipment, excavate, excavator, gravel, heavy, hydraulic, industrial, industry, large, loader, machine, machinery, mechanical, metal, outdoors, power, production, sand, scoop, shovel, site, sky, soil, tractor, transport, vehicle, working, yellow,