Ключевые слова: background white, barricade, black, building, building construction, civil engineering, civil engineering construction, construction, construction site, construction work, cotton work gloves, dangerous, dirt, dirty, equipment and equipment, fence, field work, helmet, image, materials, mini, miniature, note, off limits, public works, rail, risk, safety, safety first, security materials, security materials and equipment, sheriff, site, white back, white background, work, workers, yellow,