Ключевые слова: building, building maintenance, construction site, construction tools, construction worker, dark environment, engineering, engineering project, hard hat, hardhat, hazardous, hazardous workplace, heavy equipment, helmet, industrial, industrial activity, industrial background, industrial environment, industrial equipment, industrial facility, industrial lighting, industrial machinery, industrial operation, industrial process, industrial scene, industrial setting, industrial worker, machinery, maintenance, manual labor, night, nighttime construction, protective equipment, protective gear, repair, repair work, safety equipment, safety gear, smoke, smoke and fumes, sparks, welding sparks, work, worker, worker uniform,