Ключевые слова: activity, big, black, build, builder, bulldozer, construction, contractor, dig, digger, digging, dirt, dredge, dredger, earth, earthmover, employment, equipment, excavator, ground, happy, heavy, helmet, industrial, industry, job, machine, machinery, male, move, mover, occupation, operate, operator, power, push, safety, sand, shovel, site, smiling, track, tractor, transport, tread, vehicle, work, worker, yellow,