Ключевые слова: activity, background, backhoe, big, bucket, bulldozer, business, coal, construction, dig, digger, dirt, equipment, excavate, excavation, excavator, front, ground, heavy, hydraulic, industrial, industry, iron, large, loader, machine, machinery, metal, mining, mover, open, port, power, quarry, sand, scoop, shovel, site, soil, technology, tractor, transport, transportation, truck, vehicle, warehouse, wheel, work, yellow,