Ключевые слова: big, bulldozer, commercial land vehicle, construction, construction industry, construction machinery, construction zone, danger, driver, dumper truck, engineer, equipment, field, gravel, heavy, heavy industry, hydraulic platform, industry, large, machine, mining, pebble, powerful, pushing, road, rock, rough, safety helmet, strong, template, toy, transporting, trucking driver, two objects, wheel, work tool, worker, working, yellow, zone,