Ключевые слова: activity, background, blue, build, carry, cloud, concrete, construction, crane, development, engineering, equipment, frame, heavy, help, high, hose, housing, industry, iron, jib, job, large, lifting, machine, many, mechanism, metal, mobile, new, nobody, occupation, operator, outdoor, progress, project, pump, raise, red, service, sky, steel, sunny, support, tall, technology, tube, urban, white, work,