Ключевые слова: activity, angle, blue, cabin, city, cloud, construction, contractor, crane, daytime, development, elevated, engineering, equipment, frame, framework, growth, heavy, height, high, industry, infrastructure, installation, job, laboratory, lifting, machine, machinery, metal, movement, occupation, progress, rise, safety, site, sky, space, steel, strength, structure, tall, tasks, tools, tower, transportation, view, weight, work, working, worksite,