Ключевые слова: activity, angle, backfill, backhoe, boom, bucket, build, bulldozer, coal, construction, dig, digger, dipper, dirt, dozer, earth, engineering, equipment, excavate, excavating, excavation, excavator, fluid, front, ground, heavy, hydraulic, industrial, industry, land, loader, machine, machinery, mine, motor, mover, quarry, sand, scoop, shovel, site, soil, stick, track, tractor, undercarriage, vehicle, wheel, work, yellow,