Ключевые слова: background, builder, building, business, checking, civil, concrete, construction, contractor, design, development, engineer, engineering, equipment, foreman, gravel, happy, hard, hat, helmet, highway, industrial, industry, infrastructure, labor, machinery, maintenance, male, man, new, occupation, people, person, profession, professional, repair, road, roadwork, safety, silhouette, site, smile, structure, supervisor, surveyor, technology, theodolite, vest, work, worker,