Ключевые слова: big, coal, dig, digger, digging, dirt, dredging, dump, energy, environment, equipment, excavate, excavation, excavator, filling, ground, heavy, huge, hydraulic, industrial, industry, land, large, load, loader, machine, machinery, mine, mineral, mining, mover, open, openpit, outdoors, overweight, pit, power, raw, raw material, removing, scoop, sky, soil, surface, technology, transport, transportation, vehicle, work,