Ключевые слова: activity, blue, bulldozer, coal, construction, contruction, digging, dirt, earth, eathmoving, equipment, gravel, heavy, hydraulic, industry, lake, land, large, loader, loading, machine, machinery, metal, mine, mineral, mining, mover, openpit, outdoors, people, pit, platform, power, quarry, removing, sand, scoop, site, size, sky, strength, technology, tractor, transportation, truck, vehicle, water, working, yellow,